Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (9): 1670.doi: 10.7503/cjcu20170149

• Polymer Chemistry • Previous Articles     Next Articles

Reinforcement and Tougheness of Quartz Fiber/Silicon-containing Arylacetylene with Heat-resistant Polyetherimide Macromolecular Coupling Agent

GU Yuanbo, HU Yanhong*, DU Lei, DENG Shifeng, ZHOU Yan, RU Lingao()   

  1. Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education,
  • Received:2017-03-14 Online:2017-09-10 Published:2017-06-29
  • Contact: HU Yanhong E-mail:huyhxy@ecust.edu.cn

Abstract:

A novel acetylene-terminated polyetherimide macromolecular coupling agent(BDA-K) was designed and synthesized, and its effects on the interfacial reinforcement and toughness of the quartz fiber(QF) reinforced silicon-containing aryl-alkyne(PSA) matrix composites were investigated. The interlaminar shear strength(ILSS), flexural strength and notched impact strength increased by 54.1%, 59.0% and 23.8% compared with those of untreated at room temperature. The retention of ILSS and flexural strength reached 89.0% and 89.6% at 250 ℃ and 63.3% and 67.9% at 500 ℃, respectively. The FTIR and XPS spectra indicate that BDA-K takes part in PSA curing and effective chemical bonds form between BDA-K and QF. Owing to the introduction of heat-proof groups i.e. the imide rings to BDA-K backbone, TGA results reveal that the value of Td5 is up to 489 ℃. The interphase morphologies by SEM show that soft and moderate macromolecule layers constructed between the matrix and the fiber treated with BDA-K, which improves the mechanical strength and toughness of the QF/PSA composites.

Key words: School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China)

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