摘要
制备了Ziegler-Natta/茂金属复合催化剂。采用该复合催化剂制备的聚丙烯釜内合金具有较好的刚性,良好的低温性能,拉伸屈服应力为22.7 MPa,拉伸断裂应变为660%,悬臂梁缺口冲击强度为55.8 kJ/m2。该聚丙烯釜内合金具有较低的玻璃化转变温度,通过差示扫描量热法测试,扫描电子显微镜和透射电子显微镜等观察证实其链结构中具有长序列的乙丙嵌段结构,使制备的聚丙烯合金经过数次加工后仍然具有良好的冲击强度和稳定的相结构。
The authors prepared Zigler-Natta/metallocene hybrid catalyst.The polypropylene（PP） inreactor alloy prepared with the catalyst possessed good rigidity and excellent properties at low temperatures.The tensile stress at yield,tensile strain at break and notched Izod impact strength of the alloy were 22.7 MPa,660% and 55.8 kJ/m2,respectively.The PP in-reactor alloy had lower glass transition temperature.The results of differential scanning calorimetry（DSC）,scanning electron microscopy（SEM） and transmission electron microscopy（TEM）,etc.confirmed that the PP alloy owned a long sequence ethylene-propylene block structure,which led to the alloy′s excellent impact strength and stable phase structure after repeated processing.
出处
《合成树脂及塑料》
CAS
北大核心
2013年第1期10-13,共4页
China Synthetic Resin and Plastics
基金
汽车用聚烯烃材料单一化关键技术(国家863项目)
聚丙烯釜内合金千吨级中试研究Ⅰ(2008AA030902)
关键词
聚丙烯
齐格勒-纳塔
茂金属复合催化剂
反应器合金
乙丙嵌段结构
相结构
polypropylene
Ziegler-Natta/metallocene hybrid catalyst
in-reactor alloy
ethylene-propylene block structure
phase structure
