Abstract The improvement of miscibility between toughened Polyamide-6 (PA6) and Styrene-Butadiene Rubber (SBR) was carried out using grafted Glycidyl Methacrylate (SBR-g-GMA). At first, the compatibilizers were prepared using different comonomers, Styrene, and N-vinyl pyrrolidone. Central composited design (CCD) was distinctly applied to study the influence of Glycidyl Methacrylate (GMA) content and comonomer/GMA on the process of compatibilizer preparation. Four models were developed for Gel content and Degree of grafting for both comonomers using Design-expert software. The models were used to calculate the optimum operating conditions and according to the Flory-Huggins parameter and obtained results, SBR-co-NVP-g-GMA was chosen as an effective compatibilizer. Afterward, another CCD was employed to scrutinize the effect of various amounts and grafting degree of compatibilizer on morphology and mechanical properties of PA6/SBR. The Interparticle distance and polydispersity were studied using a Scanning electron microscope (SEM) and also the Izod impact test inspected in order to evaluate the mechanical properties. Finally, modulus and impact strength were optimized to minimize the former and maximize the latter. Also, the most practical terms in the fitted model are statistically specified using F-value. The root causes for the improvement of blend properties were attributed to a chemical reaction between epoxy groups in SBR-g-GMA and both the carboxylic and amine groups in PA6. Impact strength (539.8 J/m) and modulus (2017.2 N/mm2) of the optimum blend indicate an excellent agreement with the amounts predicted by the models.

中文翻译：

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PA6/SBR 韧性和刚性的建模和优化：使用增容剂和响应面方法

摘要 使用接枝甲基丙烯酸缩水甘油酯 (SBR-g-GMA) 提高增韧聚酰胺 6 (PA6) 和丁苯橡胶 (SBR) 之间的相容性。首先，增容剂是使用不同的共聚单体、苯乙烯和 N-乙烯基吡咯烷酮制备的。中心复合设计(CCD)明显应用于研究甲基丙烯酸缩水甘油酯(GMA)含量和共聚单体/GMA对增容剂制备过程的影响。使用 Design-expert 软件针对两种共聚单体的凝胶含量和接枝度开发了四种模型。该模型用于计算最佳操作条件，并根据 Flory-Huggins 参数和所得结果，选择 SBR-co-NVP-g-GMA 作为有效的增容剂。之后，另一个CCD被用来仔细观察增容剂的不同用量和接枝度对PA6/SBR的形态和机械性能的影响。使用扫描电子显微镜 (SEM) 研究粒子间距离和多分散性，并检查 Izod 冲击试验以评估机械性能。最后，对模量和冲击强度进行优化，使前者最小化，后者最大化。此外，拟合模型中最实用的术语是使用 F 值统计指定的。共混物性能改善的根本原因归因于 SBR-g-GMA 中的环氧基团与 PA6 中的羧基和胺基团之间的化学反应。冲击强度 (539.8 J/m) 和模量 (2017.