Preparation and Characterization of Cyano-Silicon-Containing Arylacetylene Resins and Their Composites: Dual Enhancement Strategy Involving Physical Interfacial Interactions and Chemical Crosslinking

Chao-En Jin; Hua-Mei Zhu; Lei Wang; Fan Wang; Ya-Ping Zhu; Shi-Feng Deng; Hui-Min Qi; Lei Du

doi:10.1007/s10118-024-3173-x

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Preparation and Characterization of Cyano-Silicon-Containing Arylacetylene Resins and Their Composites: Dual Enhancement Strategy Involving Physical Interfacial Interactions and Chemical Crosslinking

RESEARCH ARTICLE | Updated：2024-11-04

- Preparation and Characterization of Cyano-Silicon-Containing Arylacetylene Resins and Their Composites: Dual Enhancement Strategy Involving Physical Interfacial Interactions and Chemical Crosslinking
- Chinese Journal of Polymer Science Vol. 42, Issue 11, Pages: 1719-1729(2024)
- Affiliations：
  
  Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai 200237, China
- Author bio：
  
  qihm@ecust.edu.cn
- Funds：
- DOI：10.1007/s10118-024-3173-x
  CLC：
- Received：19 March 2024，
  
  Revised：2024-05-09，
  
  Accepted：22 May 2024，
  
  Online First：20 August 2024，
  
  Published：30 November 2024
- Accepted：
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Jin, C. E.; Zhu, H. M.; Wang, L.; Wang, F.; Zhu, Y. P.; Deng, S. F.; Qi, H. M.; Du, L. Preparation and characterization of cyano-silicon-containing arylacetylene resins and their composites: dual enhancement strategy involving physical interfacial interactions and chemical crosslinking. Chinese J. Polym. Sci. 2024, 42, 1719–1729

Chao-En Jin, Hua-Mei Zhu, Lei Wang, et al. Preparation and Characterization of Cyano-Silicon-Containing Arylacetylene Resins and Their Composites: Dual Enhancement Strategy Involving Physical Interfacial Interactions and Chemical Crosslinking[J]. Chinese Journal of Polymer Science, 2024, 42(11): 1719-1729.
Jin, C. E.; Zhu, H. M.; Wang, L.; Wang, F.; Zhu, Y. P.; Deng, S. F.; Qi, H. M.; Du, L. Preparation and characterization of cyano-silicon-containing arylacetylene resins and their composites: dual enhancement strategy involving physical interfacial interactions and chemical crosslinking. Chinese J. Polym. Sci. 2024, 42, 1719–1729 DOI： 10.1007/s10118-024-3173-x.

Chao-En Jin, Hua-Mei Zhu, Lei Wang, et al. Preparation and Characterization of Cyano-Silicon-Containing Arylacetylene Resins and Their Composites: Dual Enhancement Strategy Involving Physical Interfacial Interactions and Chemical Crosslinking[J]. Chinese Journal of Polymer Science, 2024, 42(11): 1719-1729. DOI： 10.1007/s10118-024-3173-x.

摘要

The cyclization reaction between the cyano and alkyne groups

as well as the strong polarity of the cyano group

provides the cyano-silicon-containing arylacetylene resins with a dual enhancement mechanism of chemical cross-linking and physical interactions

resulting in the mechanical properties of their composites improved while maintaining excellent heat resistance.

Abstract

Silicon-containing arylacetylene (PSA) resins have broad application prospects because of their excellent heat resistance. However

improving their mechanical properties and interfacial bonding with reinforcement fibers while maintaining heat resistance is a challenge in engineering applications. Here

poly(diethynylbenzene-methylsilyl-3-benzonitrile) (DEB-CN) and poly(diethynylbenzene-methylsilyl-3

6-diethynylcarbazole-3-benzonitrile) (DEC-CN) were synthesized

via

an isopropylmagnesium chloride lithium-chloride complex (

-PrMgCl·LiCl)

overcoming the compatibility problem between cyano groups and Grignard reagents. The cyano and alkyne groups in the resin underwent cyclization to form pyridine

catalyzed by the -NH- moiety in DEC-CN

resulting in extremely high thermal stability (5% weight loss temperature: 669.3 °C

glass transition temperature

650 °C). The combination of cyano dipole-dipole pairing and hydrogen bonding greatly enhanced the resin-fiber interface properties

while the generated pyridine promoted stress relief in the crosslinked network

substantially improving the mechanical properties of the cyano-silicon-containing arylacetylene resin composites. The flexural strength of quartz fiber cloth/DEC-CN composites was 298.2 MPa at room temperature and 145.9 MPa at 500 °C

corresponding to 84.0% and 127.6% enhancements

respectively

over the cyano-free counterpart. These cyano-silicon-containing arylacetylene resins exhibited a dual reinforcement mechanism involving physical interfacial interactions and chemical crosslinking

achieving a good balance between thermal stability and mechanical properties.

关键词

Keywords

references

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