摘要
以过氧化二异丙苯 (DCP)为引发剂 ,甲基丙烯酸缩水甘油酯 (GMA)为活性单体 ,高抗冲苯乙烯(HIPS)通过熔融接枝制得了功能化的高抗冲聚苯乙烯接枝物 (HIPS g GMA)。用红外光谱和电子能谱对其结构进行了表征。HIPS g GMA的红外谱图 ,证明GMA已经接枝到HIPS上。电子能谱分析也提供了相似的结论。研究了单体浓度和DCP用量对产物接枝率的影响 ,并用化学滴定方法测定了接枝物的接枝率。用DSC、SEM、WAXD、DMA等研究了PBT/HIPS和PBT/HIPS g GMA的结晶、形态结构、动态力学性能及力学性能随组成的变化。SEM及DMA分析表明增容后体系的相容性得到改善 ,力学性能有较大提高。
The grafting copolymer of high impact polystyrene (HIPS) with glycidyl methacrylate (GMA) (HIPS g GMA) was prepared with melt mixing in the presence of free radical initiator (DCP), FTIR, ESCA, TEM were employed to characterize the structure of the products. In the FTIR spectrum of HIPS g GMA, the new absorbed bands at 730 cm 〔 1〕 appeared, however, it was not observed in the spectrum of pure HIPS. This band is attributed to a >C=O double bond stretching in GMA. The content of GMA in grafted copolymer was measured by means of titration. The effect of concentration of monomer and the content of dicumyl peroxide (DCP) on the grafting degree were investigated. The crystallization, dynamic mechanical properties, tensile behavior and morphology features of PBT/HIPS and PBT/HIPS g GMA blend systems were studied by DSC, SEM, WAXD and DMA . It was found that the compatibility and mechanical properties of PBT/HIPS g GMA were improved obviously comparing with that of PBT/HIPS blends.
出处
《功能高分子学报》
CAS
CSCD
2002年第2期157-166,共10页
Journal of Functional Polymers
基金
国家 973课题 (G19990 64 80 6)
