In this work, effect of three factors on the phase morphology and mechanical properties of ternary blends based on polystyrene (PS)/ethylene‐propylene‐diene terpolymer (EPDM)/polyamide6 (PA6) was investigated by response surface methodology (RSM). Results indicated that among the studied factors (i.e., mixing sequence, composition, and viscosity ratio of the minor phases), the first two have the greatest effect on the impact strength (75.6%) and tensile properties (tensile modulus (84.9%) and yield stress (88.9%); while EPDM/PA6 viscosity ratio has the least effect (≤ 2.1%) on the final mechanical properties. These achievements are, in fact, arising from the considerable changes in the phase morphology and the contribution share predicted by experimental design outputs. However, mixing sequences just affected on the size of dispersed particles, but samples with different compositions presented different morphology types. According to the mechanical characterization of PS/EPDM/PA6 blends, the maximum impact strength and tensile properties were not obtained simultaneously. Optimal levels of input factors, aimed to balance impact strength and tensile properties, are M1 simultaneous mixing sequence, C1 composition (70/10/20), and V1 viscosity ratio (PA6 with low viscosity). J. VINYL ADDIT. TECHNOL., 26:282–290, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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PS / EPDM / PA6三元共混物的响应面分析：混合顺序，组成和粘度比对机械性能的影响

在这项工作中，通过响应表面方法（RSM）研究了三个因素对基于聚苯乙烯（PS）/乙烯-丙烯-二烯三元共聚物（EPDM）/聚酰胺6（PA6）的三元共混物的相形态和力学性能的影响。结果表明，在所研究的因素（即次要相的混合顺序，组成和粘度比）中，前两个因素对冲击强度（75.6％）和拉伸性能（拉伸模量（84.9％））的影响最大。屈服应力（88.9％）；而EPDM / PA6粘度比对最终机械性能的影响最小（≤2.1％），实际上，这些成就是由于相态的显着变化和由其预测的贡献份额实验设计输出，但是混合顺序仅影响分散颗粒的尺寸，但是具有不同成分的样品呈现出不同的形态类型。根据PS / EPDM / PA6共混物的机械特性，无法同时获得最大的冲击强度和拉伸性能。旨在平衡冲击强度和拉伸性能的最佳输入因子水平是M1同时混合顺序，C1组成（70/10/20）和V1粘度比（PA6低粘度）。J.乙烯基添加物。TECHNOL。，26：282–290，2020.©2019塑料工程师协会 M1同时混合顺序，C1组成（70/10/20）和V1粘度比（PA6低粘度）。J.乙烯基添加物。TECHNOL。，26：282–290，2020.©2019塑料工程师协会 M1同时混合顺序，C1组成（70/10/20）和V1粘度比（PA6低粘度）。J.乙烯基添加物。TECHNOL。，26：282–290，2020.©2019塑料工程师协会