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Indexed by:期刊论文

Date of Publication:2018-02-01

Journal:ADVANCES IN POLYMER TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:37

Issue:1

Page Number:281-289

ISSN No.:0730-6679

Key Words:Bismaleimide; Mechanical properties; Modification; Novel allyl compound; Thermal properties

Abstract:A novel allyl compound containing liquid crystalline structure, i.e., 4,4'-bis(4-allyloxy benzoic acid) phenyl ester (BAOBE), was synthesized. The chemical structure of BAOBE was characterized by Fourier transform infrared (FTIR) spectroscopy and H-1 NMR spectra, and the liquid crystalline properties were confirmed by polarized optical microscopy (POM). Besides, a series of modified bismaleimide (BMI) resins were prepared based on N,N-4,4-bismaleimidodiphenylmethylene (BDM), BAOBE, and O,O'-diallyl bisphenol A (DABPA). The results of thermogravimetric analysis (TGA) indicate that the modified resins have excellent thermal stability with the highest temperatures for 5% weight loss above 438 degrees C. The results of dynamic mechanical analysis (DMA) suggest that the glass transition temperature (T-g) of the modified resins are above 280 degrees C. Besides, the introduction of BAOBE leads to a significant improvement in the flexural and impact properties of the modified BMI resins. Compared with the resin with only DABPA as a modifier, the highest flexural and impact strength can reach 156.2 MPa and 15.6 kJ/m(2), increased by 19.2% and 90.2%, respectively.