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首页> 外文期刊>Journal of Polymer Research >Variation of core-shell structural particles and their toughening behavior in poly (vinyl chloride) (PVC) matrix
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Variation of core-shell structural particles and their toughening behavior in poly (vinyl chloride) (PVC) matrix

机译：核-壳结构颗粒的变化及其在聚氯乙烯（PVC）基体中的增韧行为

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摘要

Three methyl methacrylate-butadiene-styrene (MBS) core-shell particles with different structures, namely, "salami," "core-shell," and "multi-layer," were synthesized in this work. All theMBS particles were designed with the same defined chemical composition, which is a prerequisite for producing transparent blends with poly (vinyl chloride) (PVC). This work focused on the influence of the internal structure of core-shell particles on the properties of the PVC/MBS blends. Results of the dynamic mechanical analysis illustrated that the different internal structures greatly affected the glass transition temperature (T-g) of the rubbery phase and the storage modulus of the core-shell particles. The test results on the mechanical properties showed that the PVC/MBS blend with the "multilayer" modifier had the highest tensile stress and fracture strain values, the lowest brittle-ductile transition (BDT) temperature, and the highest impact strength at a higher temperature. With the different structure, both cavitation and debonding from the matrix were observed, which relieve the triaxial tension and promote the shear yielding of the PVC matrix. The optical property showed that the PVC/MBS blend with the "core-shell" modifier had a higher transparency than the other blends.
机译：在这项工作中，合成了三种具有不同结构的甲基丙烯酸甲酯-丁二烯-苯乙烯（MBS）核-壳颗粒，即“萨拉米”，“核-壳”和“多层”。所有MBS颗粒均设计为具有相同的定义化学组成，这是生产与聚（氯乙烯）（PVC）透明共混物的前提。这项工作的重点是核-壳颗粒的内部结构对PVC / MBS共混物性能的影响。动态力学分析结果表明，不同的内部结构极大地影响了橡胶相的玻璃化转变温度（T-g）和核-壳颗粒的储能模量。力学性能的测试结果表明，与“多层”改性剂共混的PVC / MBS具有最高的拉伸应力和断裂应变值，最低的脆性-延性转变（BDT）温度，以及在较高温度下的最高冲击强度。 。通过不同的结构，可以观察到空化和从基体脱粘，这减轻了三轴张力并促进了PVC基体的剪切屈服。光学性能表明，具有“核-壳”改性剂的PVC / MBS共混物比其他共混物具有更高的透明度。

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