Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene

Wei-Long Ju; Shao-Fan Li; Yun-Lan Su; Du-Jin Wang

doi:10.1007/s10118-022-2756-7

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Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene

RESEARCH ARTICLE | Updated：2022-10-25

- Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene
- Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene
- 高分子科学（英文版） 2022年40卷第11期页码：1411-1421
- Affiliations：
  
  a.Key Laboratory of Engineering Plastics, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  ylsu@iccas.ac.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (No. 51820105005) and the Ministry of Science and Technology of China (No. 2017YFE0117800). We would like to thank Prof. Wei You (Institute of Chemistry, Chinese Academy of Sciences) and Yudan Shui (Beijing Oriental Electronics Technology Group) for the helpful discussion of grafting method.
- DOI：10.1007/s10118-022-2756-7
  中图分类号：
- 收稿：2022-02-28，
  
  修回：2022-3-31，
  
  录用：2022-4-7，
  
  网络首发：2022-07-20，
  
  纸质出版：2022-11-01
- Accepted：
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Ju, W. L.; Li, S. F.; Su, Y. L.; Wang, D. J. Controllable synthesis of a well-defined polypropylene grafted silica nanoparticles and its effect on crystallization behavior of polypropylene. Chinese J. Polym. Sci. 2022, 40, 1411–1421

Wei-Long Ju, Shao-Fan Li, Yun-Lan Su, et al. Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene[J]. Chinese Journal of Polymer Science, 2022, 40(11): 1411-1421.
Ju, W. L.; Li, S. F.; Su, Y. L.; Wang, D. J. Controllable synthesis of a well-defined polypropylene grafted silica nanoparticles and its effect on crystallization behavior of polypropylene. Chinese J. Polym. Sci. 2022, 40, 1411–1421 DOI： 10.1007/s10118-022-2756-7.

Wei-Long Ju, Shao-Fan Li, Yun-Lan Su, et al. Controllable Synthesis of a Well-defined Polypropylene grafted Silica Nanoparticles and Its Effect on Crystallization Behavior of Polypropylene[J]. Chinese Journal of Polymer Science, 2022, 40(11): 1411-1421. DOI： 10.1007/s10118-022-2756-7.

摘要

Well-defined polypropylene grafted silica nanoparticles (PP-g-SiO

) with controlled grafting density were prepared by “grafting-to” method

which were dispersed in PP matrix to prepare nanocomposites via solution blending. The PP-g-SiO

with high molecular weight of grafted chains provided a great number of heterogeneous nucleation sites

which significantly improved the crystallization abilities of nanocomposites.

Abstract

Well-defined polypropylene grafted silica nanoparticles (PP-

-SiO

) were prepared through the reaction of maleic anhydride grafted polypropylene (PP-

-MAH) with amino-functionalized silica (SiO

-NH

) by the 'grafting-to' method. The grafting density of PP-

-SiO

is found to be controlled by the concentration of silane coupling agent 3-[2-(2-aminoethylamino) ethyl amino] propyl trimethoxy silane (TAMS). The maximum grafting density of grafted PP-

-MAH chains with molecular weight of 9100 g/mol could reach 0.34 chains/nm

when the critical concentration of TAMS was 0.0194 mol/L. The critical concentration of TAMS can be explained by the maximum amounts of primary amino groups

which can totally react with PP-

-MAH on the surface of SiO

-NH

when the silane monolayer is formed. The synthesized PP-

-SiO

with different molecular weights was mixed with PP by solution mixing to form a series of nanocomposites. The crystallization temperature (

) of nanocomposites increased significantly with the particle loading. The PP-

-SiO

with high molecular weight of grafted chains exhibits a high nucleation ability at 1 wt% nanoparticle loading in PP/PP-

-SiO

nanocomposites. In summary

we provide an effective method to synthesize the well-defined PP-

-SiO

with controlled grafting density

which shows excellent nucleation ability.

关键词

Keywords

references

Li, S. F.; Wen, X. N.; Ju, W. L.; Su, Y. L.; Wang, D. J. Effects of particle-polymer interactions and particle-particle interactions on mechanical properties of polymer nanocomposites. Acta Polymerica Sinica (in Chinese) 2021 , 52 , 146-154.

Tang, Y.; Hu, Y.; Song, L.; Zong, R. W.; Gui, Z.; Chen, Z. Y.; Fan, W. C . Preparation and thermal stability of polypropylene/montmorillonite nanocomposites . Polym. Degrad. Stabil. , 2003 . 82 127 - 131 . DOI: 10.1016/S0141-3910(03)00173-3 http://doi.org/10.1016/S0141-3910(03)00173-3 .

Du, M. l.; Guo, B. C.; Jia, D. M . Thermal stability and flame retardant effects of halloysite nanotubes on poly(propylene) . Eur. Polym. J. , 2006 . 42 1362 - 1369 . DOI: 10.1016/j.eurpolymj.2005.12.006 http://doi.org/10.1016/j.eurpolymj.2005.12.006 .

Du, F. M.; Scogna, R. C.; Zhou, W.; Brand, S.; Fischer, J. E.; Winey, K. I . Nanotube networks in polymer nanocomposites: rheology and electrical conductivity . Macromolecules , 2004 . 37 9048 - 9055 . DOI: 10.1021/ma049164g http://doi.org/10.1021/ma049164g .

Li, N.; Huang, Y.; Du, F.; He, X. B.; Lin, X.; Gao, H. J.; Ma, Y. F.; Li, F. F.; Chen, Y. S.; Eklund, P. C . Electromagnetic interference (EMI) shielding of single-walled carbon nanotube epoxy composites . Nano Lett. , 2006 . 6 1141 - 1145 . DOI: 10.1021/nl0602589 http://doi.org/10.1021/nl0602589 .

Paiva, L. B. D.; Morales, A. R.; Guimarães, T. R . Structural and optical properties of polypropylene–montmorillonite nanocomposites . Mater. Sci. Eng. A , 2007 . 447 261 - 265 . DOI: 10.1016/j.msea.2006.10.066 http://doi.org/10.1016/j.msea.2006.10.066 .

Bharadwaj, R. K . Modeling the barrier properties of polymer-layered silicate nanocomposites . Macromolecules , 2001 . 34 9189 - 9192 . DOI: 10.1021/ma010780b http://doi.org/10.1021/ma010780b .

Balart, J.; Fombuena, V.; Balart, R.; España, J. M.; Fenollar, R. N. O . Optimization of adhesion properties of polypropylene by surface modification using acrylic acid photografting . J. Appl. Polym. Sci. , 2010 . 116 3256 - 3264 . .

Liu, L. Y.; Zhao, Y.; Zhang, C. B.; Dong, Z. Y.; Wang, K. Z.; Wang, D. J . Morphological characteristics of β -nucleating agents governing the formation of the crystalline structure of isotactic polypropylene . Macromolecules , 2021 . 54 6824 - 6834 . DOI: 10.1021/acs.macromol.1c01038 http://doi.org/10.1021/acs.macromol.1c01038 .

Toyonaga, M.; Chammingkwan, P.; Terano, M.; Taniike, T . Well-defined polypropylene/polypropylene-grafted silica nanocomposites: roles of number and molecular weight of grafted chains on mechanistic reinforcement . Polymers , 2016 . 8 300/001 - 013 . .

Lu, M.; Gao, X. W.; Liu, P.; Tang, H. Y.; Wang, F.; Ding, Y. F.; Zhang, S. M.; Yang, M. S . Photo- and thermo-oxidative aging of polypropylene filled with surface modified fumed nanosilica . Compos. Commun. , 2017 . 3 51 - 58 . DOI: 10.1016/j.coco.2017.02.004 http://doi.org/10.1016/j.coco.2017.02.004 .

Kurahashi, E.; Wada, T.; Nagai, T.; Chammingkwan, P.; Terano, M.; Taniike, T . Synthesis of polypropylene functionalized with a trace amount of reactive functional groups and its utilization in graft-type nanocomposites . Polymer , 2018 . 158 46 - 52 . DOI: 10.1016/j.polymer.2018.10.041 http://doi.org/10.1016/j.polymer.2018.10.041 .

Wu, C. L.; Zhang, M. Q.; Rong, M . Z.; Lehmann, B.; Friedrich, K. Functionalisation of polypropylene by solid phase graft polymerisation and its effect on the mechanical properties of silica nanocomposites . Plast. Rubber. Compos. , 2013 . 32 445 - 450 . .

Rong, M. Z.; Zhang, M. Q.; Pan, S. L.; Friedrich, K . Interfacial effects in polypropylene–silica nanocomposites . J. Appl. Polym. Sci. , 2004 . 92 1771 - 1781 . DOI: 10.1002/app.20139 http://doi.org/10.1002/app.20139 .

Wu, C. L.; Zhang, M. Q.; Rong, M. Z.; Friedrichc, K . Tensile performance improvement of low nanoparticles filled-polypropylene composites . Compos. Sci. Technol. , 2002 . 62 1327 - 1340 . DOI: 10.1016/S0266-3538(02)00079-9 http://doi.org/10.1016/S0266-3538(02)00079-9 .

Zheng, J. Z.; Zhou, X. P.; Ying, J. R.; Xie, X. L.; Mai, Y. W . Enhanced mechanical properties of polypropylene/silica nanocomposites with surface modification of nano-silica via In situ copolymerization of methyl methacrylate and butyl Acrylate . Chinese J. Polym. Sci. , 2009 . 27 685 - 694 . DOI: 10.1142/S0256767909004382 http://doi.org/10.1142/S0256767909004382 .

Taniike, T.; Toyonaga, M.; Terano, M . Polypropylene-grafted nanoparticles as a promising strategy for boosting physical properties of polypropylene-based nanocomposites . Polymer , 2014 . 55 1012 - 1019 . DOI: 10.1016/j.polymer.2014.01.016 http://doi.org/10.1016/j.polymer.2014.01.016 .

Fukuyama, Y.; Senda, M.; Kawai, T.; Kuroda, S.; Toyonaga, M.; Taniike, T.; Terano, M . The effect of the addition of polypropylene-grafted SiO 2 nanoparticle on the thermal conductivity of isotactic polypropylene . J. Therm. Anal. Calorim. , 2014 . 117 1397 - 1405 . DOI: 10.1007/s10973-014-3881-5 http://doi.org/10.1007/s10973-014-3881-5 .

Umemori, M.; Taniike, T.; Terano, M . Influences of polypropylene grafted to SiO 2 nanoparticles on the crystallization behavior and mechanical properties of polypropylene/SiO 2 nanocomposites . Polym. Bull. , 2011 . 68 1093 - 1108 . .

Fukuyama, Y.; Kawai, T.; Kuroda, S.; Toyonaga, M.; Taniike, T.; Terano, M . The effect of the addition of polypropylene grafted SiO 2 nanoparticle on the crystallization behavior of isotactic polypropylene . J. Therm. Anal. Calorim. , 2013 . 113 1511 - 1519 . DOI: 10.1007/s10973-012-2900-7 http://doi.org/10.1007/s10973-012-2900-7 .

Yuan, W. J.; Wang, F.; Chen, Z. M.; Gao, C.; Liu, P.; Ding, Y. F.; Zhang, S. M.; Yang, M. S. . Efficient grafting of polypropylene onto silica nanoparticles and the properties of PP/PP- g -SiO 2 nanocomposites . Polymer , 2018 . 151 242 - 249 . DOI: 10.1016/j.polymer.2018.07.060 http://doi.org/10.1016/j.polymer.2018.07.060 .

Grala, M.; Bartczak, Z.; Różański, A . Morphology, thermal and mechanical properties of polypropylene/SiO 2 nanocomposites obtained by reactive blending . J. Polym. Res. , 2016 . 23 25/01 - 19 . .

Wang, W.; Wu, J. S . Interfacial influence on mechanical properties of polypropylene/polypropylene-grafted silica nanocomposites . J. Appl. Polym. Sci. , 2018 . 135 45887/00001 - 00010 . .

Stöber, W.; Fink, A. Controlled growth of monodisperse silica spheres in the micron size range J. Colloid Interface Sci. 1968 , 26 , 62-69.

Krigbaum, W. R.; Uematsu, I . Heat and entropy of fusion of isotactic polypropylene . J. Polym. Sci., Part A: Polym. Chem. , 1965 . 3 767 - 776 . .

Krache, R.; Benavente, R.; López-Majada, J. M.; Pereñ a, J. M.; Cerrada, M. L.; Pérez, E . Competition between α, β , and γ polymorphs in a β -nucleated metallocenic isotactic polypropylene . Macromolecules , 2007 . 40 6871 - 6878 . DOI: 10.1021/ma0710636 http://doi.org/10.1021/ma0710636 .

Suratwala, T. I.; Hanna, M. L.; Miller, E. L.; Whitman, P. K.; Thomas, I. M.; Ehrmann, P. R.; Maxwell, R. S.; Burnham, A. K . Surface chemistry and trimethylsilyl functionalization of Stöber silica sols . J. Non Cryst. Solids. , 2003 . 316 349 - 363 . DOI: 10.1016/S0022-3093(02)01629-0 http://doi.org/10.1016/S0022-3093(02)01629-0 .

Ek, S.; Iiskola, E. I.; Niinistö, L.; Vaittinen, J.; Pakkanen, T. T.; Root, A . A 29 Si and 13 C CP/MAS NMR study on the surface species of gas-phase-deposited γ-aminopropylalkoxysilanes on heat-treated silica . J. Phys. Chem. B , 2004 . 108 11454 - 11463 . DOI: 10.1021/jp048927z http://doi.org/10.1021/jp048927z .

Zhao, W. W.; Su, Y. L.; Gao, X.; Qian, Q. Y.; Chen, X.; Wittenbrink, R.; Wang, D. J . Confined crystallization behaviors in polyethylene/silica nanocomposites: synergetic effects of interfacial interactions and filler network . J. Polym. Sci., Part B: Polym. Phys. , 2017 . 55 498 - 505 . DOI: 10.1002/polb.24291 http://doi.org/10.1002/polb.24291 .

Chen, S.; Hayakawa, S.; Shirosaki, Y.; Fujii, E.; Kawabata, K.; Tsuru, K.; Osaka, A . Sol-gel synthesis and microstructure analysis of amino-modified hybrid silica nanoparticles from aminopropyltriethoxysilane and tetraethoxysilane . J. Am. Ceram. Soc. , 2009 . 92 2074 - 2082 . DOI: 10.1111/j.1551-2916.2009.03135.x http://doi.org/10.1111/j.1551-2916.2009.03135.x .

Rahman, I. A.; Jafarzadeh, M.; Sipaut, C. S . Synthesis of organo-functionalized nanosilica via a co-condensation modification using γ -aminopropyltriethoxysilane (APTES) . Ceram. Int. , 2009 . 35 1883 - 1888 . DOI: 10.1016/j.ceramint.2008.10.028 http://doi.org/10.1016/j.ceramint.2008.10.028 .

Zhou, H. J.; Rong, M. Z.; Zhang, M. Q.; Ruan, W. H.; Friedrich, K . Role of reactive compatibilization in preparation of nanosilica/polypropylene composites . Polym. Eng. Sci. , 2007 . 47 499 - 509 . DOI: 10.1002/pen.20724 http://doi.org/10.1002/pen.20724 .

Lu, Q. W.; Macosko, C. W.; Horrion, J . Melt amination of polypropylenes . J. Polym. Sci., Part A: Polym. Chem. , 2005 . 43 4217 - 4232 . DOI: 10.1002/pola.20899 http://doi.org/10.1002/pola.20899 .

Efremova, N. V.; Sheth, S. R.; Leckband, D. E . Protein-induced changes in poly(ethylene glycol) brushes: molecular weight and temperature dependence . Langmuir , 2001 . 17 7628 - 7636 . DOI: 10.1021/la010405c http://doi.org/10.1021/la010405c .

Malmsten, M . Formation of adsorbed protein Layers . J. Colloid Interface. Sci. , 1998 . 207 186 - 199 . DOI: 10.1006/jcis.1998.5763 http://doi.org/10.1006/jcis.1998.5763 .

Gengenbach, T. R.; Griesser, H. J . Aging of 1,3-diaminopropane plasma-deposited polymer films: mechanisms and reaction pathways . J. Polym. Sci., Part A: Polym. Chem. , 1999 . 37 2191 - 2206 . DOI: 10.1002/(SICI)1099-0518(19990701)37:13<2191::AID-POLA34>3.0.CO;2-F http://doi.org/10.1002/(SICI)1099-0518(19990701)37:13<2191::AID-POLA34>3.0.CO;2-F .

Chen, J. J.; Yu, Y.; Chen, J. Y.; Li, H. L.; Ji, J. Y.; Liu, D. J . Chemical modification of palygorskite with maleic anhydride modified polypropylene: mechanical properties, morphology, and crystal structure of palygorskite/polypropylene nanocomposites . Appl. Clay. Sci. , 2015 . 115 230 - 237 . DOI: 10.1016/j.clay.2015.07.012 http://doi.org/10.1016/j.clay.2015.07.012 .

Hashemi-Nasab, R.; Mirabedini, S. M . Effect of silica nanoparticles surface treatment on in situ polymerization of styrene-butyl acrylate latex . Prog. Org. Coat. , 2013 . 76 1016 - 1023 . DOI: 10.1016/j.porgcoat.2013.02.016 http://doi.org/10.1016/j.porgcoat.2013.02.016 .

Wu, F.; Zhang, B.; Yang, W.; Liu, Z. Y.; Yang, M. B . Inorganic silica functionalized with PLLA chains via grafting methods to enhance the melt strength of PLLA/silica nanocomposites . Polymer , 2014 . 55 5760 - 5772 . DOI: 10.1016/j.polymer.2014.08.070 http://doi.org/10.1016/j.polymer.2014.08.070 .

Vrancken, K. C.; Casteleyn, E.; Possemiers, K.; Voort, P. V. D.; Vansant, E. F . Modelling of the reaction-phase interaction of γ -aminopropyltriethoxysilane with silica . J. Chem. Soc., Faraday Trans. , 1993 . 89 2037 - 2040 . DOI: 10.1039/FT9938902037 http://doi.org/10.1039/FT9938902037 .

Simon, A.; Cohen-Bouhacina, T.; Porte, M. C.; Aime, J. P.; Baquey, C . Study of two grafting methods for obtaining a 3-aminopropyltriethoxysilane monolayer on silica surface . J. Colloid Interface Sci. , 2002 . 251 278 - 283 . DOI: 10.1006/jcis.2002.8385 http://doi.org/10.1006/jcis.2002.8385 .

Ahn, Y. N.; Lee, S. H.; Oh, S. Y . Adsorption characteristics of silane-functionalized perfluoropolyether on hydroxylated glassy silica surfaces: a multiscale approach . Appl. Surf. Sci. , 2019 . 496 143699 DOI: 10.1016/j.apsusc.2019.143699 http://doi.org/10.1016/j.apsusc.2019.143699 .

Nakamura, Y.; Yamazaki, R.; Fukuda, T.; Shitajima, K.; Fujii, S.; Sasaki, M . Structure of silane layer formed on silica particle surfaces by treatment with silane coupling agents having various functional groups . J. Adhes. Sci. Technol. , 2014 . 28 1895 - 1906 . DOI: 10.1080/01694243.2014.926576 http://doi.org/10.1080/01694243.2014.926576 .

Zhu, M.; Lerum, M. Z.; Chen, W . How to prepare reproducible, homogeneous, and hydrolytically stable aminosilane-derived layers on silica . Langmuir , 2012 . 28 416 - 423 . DOI: 10.1021/la203638g http://doi.org/10.1021/la203638g .

Pham, K. N.; Fullston, D.; Sagoe-Crentsil, K. . Surface charge modification of nano-sized silica colloid . Aust. J. Chem. , 2007 . 60 662 - 666 . DOI: 10.1071/CH07138 http://doi.org/10.1071/CH07138 .

Naviroj, S.; Koenig, J. L.; Ishida, H . Molecular structure of an aminosilane coupling agent as influenced by carbon dioxide in air, pH, and drying conditions . J. Macromol. Sci. B , 2006 . 22 291 - 304 . .

Wang, D.; Jonesf, F. R . Surface analytical study of the interaction between γ -amino propyl triethoxysilane and E-glass surface . J. Mater. Sci. , 1993 . 28 2481 - 2488 . DOI: 10.1007/BF01151683 http://doi.org/10.1007/BF01151683 .

Pallavicini, P.; Cabrini, E.; Casu, A.; Dacarro, G.; Diaz-Fernandez, Y . A.; Falqui, A.; Milanese, C.; Vita, F. Silane-coated magnetic nanoparticles with surface thiol functions for conjugation with gold nanostars . Dalton Trans. , 2015 . 44 21088 - 21098 . DOI: 10.1039/C5DT02812D http://doi.org/10.1039/C5DT02812D .

Paukkeri, R.; Lehtinen, A . Thermal behaviour of polypropylene fractions: 2. The multiple melting peaks . Polymer , 1993 . 34 4083 - 4088 . DOI: 10.1016/0032-3861(93)90670-6 http://doi.org/10.1016/0032-3861(93)90670-6 .

Zia, Q.; Androsch, R.; Radusch, H. J.; Piccarolo, S . Morphology, reorganization and stability of mesomorphic nanocrystals in isotactic polypropylene . Polymer , 2006 . 47 8163 - 8172 . DOI: 10.1016/j.polymer.2006.09.038 http://doi.org/10.1016/j.polymer.2006.09.038 .

Chen, J. H.; Yao, B. X.; Su, W. B.; Yang, Y. B . Isothermal crystallization behavior of isotactic polypropylene blended with small loading of polyhedral oligomeric silsesquioxane . Polymer , 2007 . 48 1756 - 1769 . DOI: 10.1016/j.polymer.2007.01.010 http://doi.org/10.1016/j.polymer.2007.01.010 .

Rybniář, F . Efficiency of nucleating additives in polypropylene . J. Appl. Polym. Sci. , 1969 . 13 827 - 833 . DOI: 10.1002/app.1969.070130502 http://doi.org/10.1002/app.1969.070130502 .

Mubarak, Y. A.; Abu-Halimeh, R.; Schubert, D. . Thermal and morphological properties of polypropylene/styrene-butadiene-styrene nanocomposites . Polym-Plast. Technol. Mater. , 2018 . 57 1542 - 1553 . DOI: 10.1080/03602559.2017.1410840 http://doi.org/10.1080/03602559.2017.1410840 .

Zhou, R. J.; Burkhart, T . Polypropylene/SiO 2 nanocomposites filled with different nanosilicas: thermal and mechanical properties, morphology and interphase characterization . J. Mater. Sci. , 2010 . 46 1228 - 1238 . .

Bailly, M.; Kontopoulou, M . Preparation and characterization of thermoplastic olefin/nanosilica composites using a silane-grafted polypropylene matrix . Polymer , 2009 . 50 2472 - 2480 . DOI: 10.1016/j.polymer.2009.03.034 http://doi.org/10.1016/j.polymer.2009.03.034 .

Xu, N.; Zhou, W.; Shi, W. F . Preparation and enhanced properties of poly(propylene)/silica-grafted-hyperbranched polyester nanocomposites . Polym. Adv. Technol. , 2004 . 15 654 - 661 . DOI: 10.1002/pat.522 http://doi.org/10.1002/pat.522 .

Vladimirov, V.; Betchev, C.; Vassiliou, A.; Papageorgiou, G.; Bikiaris, D . Dynamic mechanical and morphological studies of isotactic polypropylene/fumed silica nanocomposites with enhanced gas barrier properties . Compos. Sci. Technol. , 2006 . 66 2935 - 2944 . DOI: 10.1016/j.compscitech.2006.02.010 http://doi.org/10.1016/j.compscitech.2006.02.010 .

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