摘要
通过向聚烯烃弹性体(POE)中添加不同含量的超高流动性聚丙烯(PP)制备出POE/PP共混体系。研究了共混体系的加工性能、力学性能、电绝缘性能和相容性等。结果表明,随着PP含量的增加,共混体系的熔体流动速率增大,加工扭矩降低;随着PP含量的增加,共混体系的断裂伸长率先上升后保持不变,断裂强度则是先上升后下降;当PP含量小于20%时,共混体系的体积电阻增加缓慢,而当PP含量大于20%时,其体积电阻则急剧增加;当PP含量为5%时,介电强度最大,随后随着PP含量的增加介电强度降低;随着PP含量的增加,2种聚合物依次形成了"海-岛"结构、互穿网络结构和带状结构。
The POE/PP compounding system was fabricated by adding different contents of ultrahigh flowable PP into POE. The processing performance, mechanical properties, electrical insulation properties and compatibility of this compounding system were investigated extensively. The results indicated that the melt flow rate increased along with a decrease in processing torque with increasing content of ultrahigh flowable PP. The elongation at break presented an increase in the beginning and then kept stable at a certain value, whereas the tensile strength showed a trend from rise to decline. On the other hand, the volume resistance of compounding system revealed a drastic increase when the content of ultrahigh flowable PP exceeded 20 wt %. The compounding system achieved a maximum value in dielectric strength at a PP content of 5 %, but the dielectric strength began to decline over this loading of ultrahigh flowable PP. This compounding system presented a microstructural evolution from a ＂sea-island＂ form to the network one and then to the ribbon one with an increase of the content of ultrahigh flowable PP.
出处
《中国塑料》
CAS
CSCD
北大核心
2017年第2期38-42,共5页
China Plastics
关键词
超高流动性聚丙烯
聚烯烃弹性体
共混体系
ultrahigh mobility polypropylene
polyolefin elastomer
blending system
