材料科学
聚丙烯
三元运算
艾氏冲击强度试验
聚合物混合物
增容
复合材料
弹性体
乙丙橡胶
共聚物
天然橡胶
脆性
硫化
聚合物
极限抗拉强度
计算机科学
程序设计语言
作者
Do-Kyun Kim,Seong Hwan Lee,Shin-Ki Hong,Se Won Han,Dae Ho Lee,Seunggun Yu
出处
期刊:ACS applied polymer materials
[American Chemical Society]
日期:2022-08-31
卷期号:4 (10): 7834-7840
被引量:10
标识
DOI:10.1021/acsapm.2c01221
摘要
Despite its versatility, the use of polypropylene (PP) has been limited to subzero temperature applications owing to its inherent brittleness at low temperatures. Herein, we introduce a PP ternary blend toughened by tailoring the domains of ethylene-propylene rubber (EPR) and poly(ethylene-co-octene) (EOC) within a PP matrix. The PP ternary blend was fabricated by melt-blending a PP and EOC binary mixture; a PP copolymer (PPC) was used as an additive. The Izod impact strength of the PP ternary blends dramatically increased between −50–20 °C compared to that of the iPP/EOC binary blend. Particularly, PP ternary blends with specific compositions exhibited impact strengths above 70 kJ/m2 even at −40 °C. The retraction rate of these blends was similar to that of high-performance specialty rubbers. Moreover, the blends exhibited a low brittleness temperature of −72.9 °C and, hence, may replace the expensive rubber products currently used for various low-temperature applications.
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