

FOLLOWUS
a.Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Shaanxi University of Science & Technology, Xi’an 710021, China
b.Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
c.School of Light Industry and Engineering, Qi Lu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
zhangwanbin@sust.edu.cn (W.B.Z.)
zhanggh@sust.edu.cn (G.H.Z.)
Received:09 December 2020,
Revised:2021-2-6,
Accepted:23 February 2021,
Online First:31 May 2021,
Published:18 June 2021
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Zhang, W. B.; Luo, J.; Wang, Y. M.; Zhu, X. Z.; Zhang, C.; Liu, J.; Ni, M. L.; Zhang, G. H. Hydroxyl-terminated polyethylenes bearing functional side groups: facile synthesis and their properties. Chinese J. Polym. Sci. 2021, 39, 994–1003
Wan-Bin Zhang, Jie Luo, Yan-Meng Wang, et al. Hydroxyl-terminated Polyethylenes Bearing Functional Side Groups: Facile Synthesis and Their Properties[J]. Chinese Journal of Polymer Science, 2021, 39(8): 994-1003.
Zhang, W. B.; Luo, J.; Wang, Y. M.; Zhu, X. Z.; Zhang, C.; Liu, J.; Ni, M. L.; Zhang, G. H. Hydroxyl-terminated polyethylenes bearing functional side groups: facile synthesis and their properties. Chinese J. Polym. Sci. 2021, 39, 994–1003 DOI: 10.1007/s10118-021-2572-5.
Wan-Bin Zhang, Jie Luo, Yan-Meng Wang, et al. Hydroxyl-terminated Polyethylenes Bearing Functional Side Groups: Facile Synthesis and Their Properties[J]. Chinese Journal of Polymer Science, 2021, 39(8): 994-1003. DOI: 10.1007/s10118-021-2572-5.
A series of hydroxyl-terminated polyethylenes (HTPE) bearing various functional side groups (
e.g.
carboxyl
ester and butane groups) were synthesized by the combination of ring-opening metathesis polymerization (ROMP) and visible light photocatalytic thiol-ene reaction. The products are named as
α
ω
-dihydroxyl-poly[(propionyloxythio)methinetrimethylene] (HTPE
carboxyl
)
α
ω
-dihydroxyl-poly[(methylpropionatethio)methinetrimethylene] (HTPE
ester
) and
α
ω
-dihydroxyl-poly[(butylthio) methinetrimethylene] (HTPE
butane
)
respectively. The investigation of ROMP indicated that the molecular weight of resultant hydroxyl-terminated polybutadiene (HTPB) can be tailored by varying the feed ratios of monomer to chain transfer agent (CTA). The exploration of the photocatalytic thiol-ene reaction between HTPB precursor and methyl 3-mercaptopropionate revealed that blue light as well as oxygen accelerated the reaction.
1
H-NMR and
13
C-NMR results verified all the double bonds in HTPB can be modified
and the main chain of resultant polymer can be considered as polyethylene. Subsequently
relationship between the structure of side groups and the thermal properties of functional PEs was studied. And the results suggested that the
T
g
was in the order of HTPE
butane
<
HTPE
ester
<
HTPE
carboxyl
. Greater interaction between side groups resulted in higher
T
g
. Moreover
all the functional PE samples exhibited poor thermostability as compared to HTPB. Finally
the promising applications for functional PEs were explored. HTPE
carboxyl
can be utilized as a smart material with pH-responsive properties due to its pH-dependent ionization of carboxyl side groups. HTPE
butane
can be employed as a macro-initiator for building the triblock copolymer due to the presence of active hydroxyl end groups. HTPE
ester
can serve as a plasticizer for PVC which can enhance the ductility of PVC without obviously sacrificing strength.
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