共聚物型的PP材料有较低的热变形温度（100℃）、低透明度、低光泽度、低刚性，但是有更强的抗冲击强度，PP的冲击强度随着乙烯含量的增加而增大。PP的维卡软化温度为150℃。由于结晶度较高，这种材料的表面刚度和抗划痕特性很好。PP不存在环境应力开裂问题。
Copolymer PP has lower thermal deformation temperature (100 C), low transparency, low gloss and low rigidity, but has stronger impact strength. The impact strength of PP increases with the increase of ethylene content. The Vicat softening temperature of PP is 150 C. Because of its high crystallinity, the surface stiffness and scratch resistance of this material are very good. There is no environmental stress cracking in PP.
PP的熔体质量流动速率（MFR）通常在1~100。低MFR的PP材料抗冲击特性较好但延展强度较低。对于相同MFR的材料，共聚型的抗冲强度比均聚型的要高。由于结晶，PP的收缩率相当高，一般为1.6~2.0%。

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com.cnmojulbs.37ix.com.cnmelt mass flow rate (MFR) of PP is usually between 1 and 100. Low MFR P P material has better impact resistance but lower ductility. For the same MFR material, the impact strength of copolymer is higher than that of homopolymer. As a result of crystallization, the shrinkage of PP is quite high, generally 1.6-2.0%.

2017年10月27日，世界卫生组织国际癌症研究机构公布的致癌物清单初步整理参考，聚丙烯在3类致癌物清单中。
On October 27, 2017, the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization was preliminarily sorted out and referred to. Polypropylene was included in the list of three types of carcinogens.