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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical properties of films prepared from model high-glass-transition-temperature/low-glass-transition-temperature latex blends
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Mechanical properties of films prepared from model high-glass-transition-temperature/low-glass-transition-temperature latex blends

机译：由高玻璃化转变温度/低玻璃化转变温度的乳胶混合物制备的薄膜的机械性能

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The mechanical properties of films prepared from model high-glass-transition-temperature (T-g)/low-T-g latex blends were investigated with tensile testing and dynamic mechanical analysis. Polystyrene (PS; carboxylated and noncarboxylated) and poly(n-butyl methacrylate-co-nbutyl acrylate) [P(BMA/BA); noncarboxylated] were used as the model high-T-g and low-T-g latexes, respectively. Carboxyl groups were incorporated into the PS latex particles to alter their surface properties. It was found that the presence of carboxyl groups on the high-Tg latex particles enhanced the Young's moduli and the yield strength of the PS/P(BMA/BA) latex blend films but did not influence ultimate properties, such as the stress at break and maximum elongation. These phenomena could be explained by the maximum packing density of the PS latex particles, the particle-particle interfacial adhesion, and the formation of a "glassy" interphase. The dynamic mechanical properties of the latex blend films were also investigated in terms of the carboxyl group coverage on the PS latex particles; these results confirmed that the carboxyl groups significantly influenced the modulus through the mechanism of a glassy interphase formation. (C) 2002 Wiley Periodicals, Inc. [References: 40]
机译：通过拉伸试验和动态力学分析研究了由高玻璃化转变温度（T-g）/低T-g乳胶共混物制备的薄膜的机械性能。聚苯乙烯（PS;羧化和非羧化的）和聚（甲基丙烯酸正丁酯-丙烯酸正丁酯）[P（BMA / BA）;非羧基化]分别用作模型高T-g和低T-g乳胶。将羧基结合到PS胶乳颗粒中以改变其表面性质。发现高Tg胶乳颗粒上存在羧基增强了PS / P（BMA / BA）胶乳共混膜的杨氏模量和屈服强度，但不影响最终性能，例如断裂应力和最大伸长率。这些现象可以通过PS胶乳颗粒的最大堆积密度，颗粒与颗粒之间的界面粘附以及“玻璃状”界面的形成来解释。还根据PS胶乳颗粒上的羧基覆盖率研究了胶乳共混膜的动态力学性能。这些结果证实了羧基通过玻璃状界面形成的机理显着影响了模量。 （C）2002 Wiley Periodicals，Inc. [参考：40]

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