The viscosity and gel time of resin system of modified bismaleimide(BMI) resin with rigid polyetherimide(PEI) and the mechanical properties of PEI/BMI/RS/ glass composite materials were studied.
研究了刚性聚醚酰亚胺（ PEI）改性双马来酰亚胺（B MI） 树脂体系粘度特性和凝胶特性，以及PEI/BMI/RS/玻纤复合材料的力学性能。
A new kind of epoxy resin adduct polyol (EAP) with rigid backbone was synthesized by the reaction of bisphenol - a type epoxy resin with acetic acid and characterized with FTIR and 1h - NMR.
用双酚a型环氧树脂与乙酸反应，合成了具有刚性骨架的环氧树脂加成多元醇(EAP)，并用FTIR与1h - NMR对其进行了表征。
Tensile strength of LDPE resin low voltage differential, rigid poor dimensional stability when processing poor, and connection difficulties, not suitable as a water supply pressure tube material.
LDPE树脂的拉伸强度低，耐压差，刚性差，成型加工时尺寸稳定性差，并且连接困难，不适宜作为给水压力管的材料。
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