不同聚烯烃共聚物对熔融混合聚丙烯共混物性能的影响,Journal of Applied Polymer Science

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不同聚烯烃共聚物对熔融混合聚丙烯共混物性能的影响
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2022-06-02 , DOI: 10.1002/app.52691
Thi Thu Loan Doan ₁ , Michael Thomas Müller ₂ , Hoang M. Nguyen ₁

Affiliation

聚丙烯 (PP) 是一种经济实惠的塑料商品，但由于其有限的机械性能（包括显着低的冲击强度），在工程应用中缺乏大量使用。在这项工作中，三种聚烯烃基共聚物包括乙烯-辛烯无规嵌段 (Engage, E)、乙烯-辛烯多嵌段 (Infuse, I) 和乙烯-丙烯共聚物 (Versify, V) 与 PP 共混。发现 V 共聚物是可混溶的，而其余的在 PP 基质中是不混溶的。机械测试表明，添加 20% E 和 20% I 共聚物显着提高了 PP 在-20°C 时的冲击韧性分别高达 83% 和 108%。在较高温度如 25°C 下，PP/E20 和 PP/I20 的冲击韧性分别为 400% 和 571%。PP 冲击韧性的提高受所添加的不混溶共聚物的粒径控制。实验结果还表明，PP与共聚物良好的相容性对PP的力学性能影响不大，而添加的共聚物的本质起关键作用。这项工作的结果为设计具有理想性能的 PP 基产品提供了重要的见解，以满足工程应用的要求。

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Effects of different polyolefin copolymers on properties of melt mixed polypropylene blends

Polypropylene (PP) is an affordable plastic commodity but lacks massive use in engineering applications given its limited mechanical properties including significantly low impact strength. In this work, three polyolefin-based copolymers including ethylene-octene random block (Engage, E), ethylene-octene multi-block (Infuse, I), and ethylene-propylene copolymer (Versify, V) were blended with PP. It was found that the V copolymer was miscible while the rests were immiscible in the PP matrix. Mechanical testings indicated that the addition of the 20% E and 20% I copolymers significantly enhanced the impact toughness of PP up to 83% and 108% at −20°C, respectively. At a higher temperature such as 25°C, the impact toughness of the PP/E20 and PP/I20 were 400 and 571%, respectively. The enhancement of the PP impact toughness was governed by the particle size of the added immiscible copolymers. Experimental results also revealed that the good compatibility between PP and copolymers has an insignificant influence on the mechanical properties of PP while the essence of added copolymer plays a key role instead. The findings from this work provide significant insights into the design of PP-based products with desirable properties to satisfy requirements demanded by engineering applications.

更新日期：2022-06-02

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