probably polypropylene
可能聚丙烯
以上为机器翻译结果，长、整句建议使用 人工翻译 。
An increase in crystal grain size of co-polypropylene probably resulted in a decrease in the specific nonessential work of fracture, which induced less ability in preventing fracture for long time.
共聚聚丙烯的晶粒尺寸较大可能造成其比基本断裂功减小，致使其耐长期破裂行为较差。
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