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首页> 外文期刊>Journal of Applied Polymer Science >Thermal and mechanical properties of poly(methyl methacrylate) and ethylene vinyl acetate copolymer blends
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Thermal and mechanical properties of poly(methyl methacrylate) and ethylene vinyl acetate copolymer blends

机译：聚（甲基丙烯酸甲酯）和乙烯乙酸乙烯酯共聚物共混物的热和机械性能

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摘要

A series of poly(methyl methacrylate) (PMMA) blends have been prepared with different compositions viz., 5, 10, 15, and 20 wt % ethylene vinyl acetate (EVA) copolymer by melt blending method in Haake Rheocord. The effect of different compositions of EVA on the physico-mechanical and thermal properties of PMMA and EVA copolymer blends have been studied. Differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) has been employed to investigate the phase behavior of PMMA/EVA blends from the point of view of component specific interactions, molecular motions and morphology. The resulting morphologies of the various blends also studied by optical microscope. The DSC analysis indicates the phase separation between the PMMA matrix and EVA domains. The impact strength analysis revealed a substantial increase in impact strength from 19 to 32 J/m. The TGA analysis reveals the reduction in onset of thermal degradation temperature of PMMA with increase in EVA component of the blend. The optical microscope photographs have demonstrated the PMMA/EVA system had a microphase separated structure consisting of dispersed EVA domains within a continuous PMMA matrix. (c) 2007 Wiley Periodicals, Inc.
机译：已经通过在Haake Rheocord中的熔融共混方法制备了具有不同组成的一系列聚（甲基丙烯酸甲酯）（PMMA）共混物，即5、10、15、15和20wt％的乙烯乙酸乙烯酯（EVA）共聚物。研究了不同组成的EVA对PMMA和EVA共聚物共混物的物理力学和热学性能的影响。从组分特异性相互作用，分子运动和形态学的角度出发，已采用差示扫描量热法（DSC），动态力学分析（DMA）和热重分析（TGA）来研究PMMA / EVA共混物的相行为。还通过光学显微镜研究了各种共混物的最终形态。 DSC分析表明PMMA基质和EVA域之间的相分离。冲击强度分析表明，冲击强度从19 J / m显着增加。 TGA分析表明，随着共混物EVA组分的增加，PMMA的热降解温度开始降低。光学显微镜照片显示，PMMA / EVA系统具有微相分离的结构，该结构由连续的PMMA基质内的分散EVA域组成。 （c）2007年Wiley Periodicals，Inc.

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