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Effects of polymerization parameters on the slow crack growth resistance and rheological properties of bimodal polyethylene resins
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-11-02 , DOI: 10.1002/app.51867 Mohammad Hossein Jandaghian 1, 2 , Yasaman Maddah 1, 2 , Abdolhannan Sepahi 2 , Saeed Houshmandmoayed 2 , Ehsan Nikzinat 1, 2 , Maryam Masoori 2 , Kamal Afzali 2 , Reza Rashedi 1, 2
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-11-02 , DOI: 10.1002/app.51867 Mohammad Hossein Jandaghian 1, 2 , Yasaman Maddah 1, 2 , Abdolhannan Sepahi 2 , Saeed Houshmandmoayed 2 , Ehsan Nikzinat 1, 2 , Maryam Masoori 2 , Kamal Afzali 2 , Reza Rashedi 1, 2
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In this paper, using a comprehensive study, we have investigated the effect of various polymerization parameters during the synthesis of bimodal polyethylene resins on their rheological and mechanical properties. Bimodal polyethylene resins were synthesized in two subsequent stages in a lab-scale reactor by manipulating a set of parameters such as C2/H2 ratios in the first and second stages, the split value, and the comonomer type. The results showed that the comonomer type and C2/H2 ratio of the second stage of the polymerization are the most critical parameters that control the final resins' slow crack growth resistance properties. On the other hand, the shear-thinning behavior of the resins is mainly controlled by the first-stage polymers. Although the C2/H2 ratio of the first stage results in a moderate effect on the rheological properties of the final resins, its split value governs the flow characteristics of the final molten polymers under high shear rates.
中文翻译：
聚合参数对双峰聚乙烯树脂抗慢速裂纹扩展性能和流变性能的影响
在本文中，我们通过综合研究，研究了双峰聚乙烯树脂合成过程中各种聚合参数对其流变学和力学性能的影响。双峰聚乙烯树脂是在实验室规模的反应器中的两个后续阶段中合成的，通过控制一组参数，例如第一阶段和第二阶段中的C 2 /H 2比率、分流值和共聚单体类型。结果表明，共聚单体类型和C 2 /H 2聚合第二阶段的比率是控制最终树脂的抗缓慢裂纹增长性能的最关键参数。另一方面，树脂的剪切稀化行为主要受第一阶段聚合物的控制。尽管第一阶段的 C 2 /H 2比对最终树脂的流变性能有中等影响，但其分流值决定了最终熔融聚合物在高剪切速率下的流动特性。
更新日期：2022-01-08
中文翻译：
聚合参数对双峰聚乙烯树脂抗慢速裂纹扩展性能和流变性能的影响
在本文中，我们通过综合研究，研究了双峰聚乙烯树脂合成过程中各种聚合参数对其流变学和力学性能的影响。双峰聚乙烯树脂是在实验室规模的反应器中的两个后续阶段中合成的，通过控制一组参数，例如第一阶段和第二阶段中的C 2 /H 2比率、分流值和共聚单体类型。结果表明，共聚单体类型和C 2 /H 2聚合第二阶段的比率是控制最终树脂的抗缓慢裂纹增长性能的最关键参数。另一方面，树脂的剪切稀化行为主要受第一阶段聚合物的控制。尽管第一阶段的 C 2 /H 2比对最终树脂的流变性能有中等影响，但其分流值决定了最终熔融聚合物在高剪切速率下的流动特性。
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