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Title of Journal: Sci China Technol Sci

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Abbravation: Science China Technological Sciences

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Science China Press

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DOI

10.1016/j.aeue.2016.04.016

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1869-1900

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Phase separation morphology and mode II interlamin

Authors: ShuJun Sun MiaoCai Guo XiaoSu Yi ZuoGuang Zhang
Publish Date: 2017/01/20
Volume: 60, Issue: 3, Pages: 444-451
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Abstract

Toughness improvement of bismaleimide BMI resin is very important for its application in composite materials Blending with thermoplastic polymer is usually used to increase the toughness of BMI matrix In this work we prepared two thermoplastic polymers with polar triphenylphosphine oxide group in the polymer backbone The synthesized thermoplastics with different polarities were investigated by several physicochemical methods Then through scanning electronic microscopy we observed the phase separation morphology of BMI blends at different doping concentrations of thermoplastics Additionally mode II interlaminar fracture toughness G IIC of BMI laminates toughened with thermoplastics by exsitu method was examined The results showed that thermoplastic with strong polarity would bind tightly with BMI during curing and the phaseseparation structure might be fixed at the primary stage while secondary phase separation could happen in a relatively weak polarity system It indicates that by regulating the polarity of thermoplastic we may control the phase separation morphologies of blending system and the mechanical properties of composite

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