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首页> 外文期刊>Journal of Applied Polymer Science >Morphology and thermal and mechanical properties of PBT/HIPS and PBT/HIPS-g-GMA blends
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Morphology and thermal and mechanical properties of PBT/HIPS and PBT/HIPS-g-GMA blends

机译：PBT / HIPS和PBT / HIPS-g-GMA共混物的形貌以及热力学性能

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The modification of high-impact polystyrene (HIPS) was accomplished by melt-grafting glycidyl methacrylate (GMA) on its molecular chains. Fourier transform infrared spectroscopy and electron spectroscopy for chemical analysis were used to characterize the formation of HIPS-g-GMA copolymers. The content of GMA in HIPS-g-GMA copolymer was determined by using the titration method. The effect of the concentrations of GMA and dicumyl peroxide on the degree of grafting was studied. A total of 1.9% of GMA can be grafted on HIPS. HIPS-g-GNU was used to prepare binary blends with poly(buthylene terephthalate) (PBT), and the evidence of reactions between the grafting copolymer and PBT in the blends was confirmed by scanning electron microscopy (SEM), dynamic mechanical analysis, and its mechanical properties. The SEM result showed that the domain size in PBT/HIPS-g-GMA blends was reduced significantly compared with that in PBT/HIPS blends; moreover, the improved strength was measured in PBT/HIPS-g-GMA blends and results from good interfacial adhesion. The reaction between ester groups of PBT and epoxy groups of HIPS-g-GMA can depress crystallinity and the crystal perfection of PBT. (C) 2002 Wiley Periodicals, Inc. [References: 25]
机译：高抗冲聚苯乙烯（HIPS）的改性是通过在其分子链上熔融接枝甲基丙烯酸缩水甘油酯（GMA）来完成的。化学分析的傅里叶变换红外光谱和电子光谱被用来表征HIPS-g-GMA共聚物的形成。用滴定法测定HIPS-g-GMA共聚物中GMA的含量。研究了GMA和过氧化二枯基的浓度对接枝度的影响。总共1.9％的GMA可以嫁接到HIPS上。使用HIPS-g-GNU制备与聚对苯二甲酸丁二酯（PBT）的二元共混物，并通过扫描电子显微镜（SEM），动态力学分析和其机械性能。 SEM结果表明，与PBT / HIPS共混物相比，PBT / HIPS-g-GMA共混物的畴尺寸明显减小。此外，在PBT / HIPS-g-GMA共混物中测得的强度有所提高，这归因于良好的界面粘合性。 PBT的酯基与HIPS-g-GMA的环氧基之间的反应会降低PBT的结晶度和晶体完整性。 （C）2002 Wiley Periodicals，Inc. [参考：25]

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