Modification of illite with calcium pimelate and its influence on the crystallization and mechanical property of isotactic polypropylene
Modification of illite with calcium pimelate and its influence on the crystallization and mechanical property of isotactic polypropylene
复制标题
庚二酸钙改性伊利石及其对等规聚丙烯结晶和力学性能的影响
DOI：
10.1016/j.compositesa.2019.05.018
复制
发表时间：
2019-08-01
影响因子：
8.7
通讯作者：
Yan, Shouke
中科院分区：
文献类型：
--
作者：
Song, Tiantian;Ren, Zhongjie;Yan, Shouke
利用CaHA修饰伊利石，制备了一种具有iPP β成核能力的新型伊利石，即CaHA-伊利石。研究了iPP/CaHA-伊利石复合材料的结晶行为和力学性能。为了比较，复合材料也简单地通过在微型挤出机中混合期间同时向iPP基质中添加不同组分来制备。结果表明，由于伊利石和CaHA的成核能力相反，伊利石抑制iPP的β结晶，而CaHA促进iPP的β结晶。CaHA-伊利石对诱导iPP β晶化非常有效。它的效率比其他任何样品都高。由于高结晶度和β iPP晶体分数，iPP/CaHA-illite具有最好的力学性能，拉伸模量增加36%，最大应变增加163%，无缺口冲击强度增加69%。同时，纯iPP的拉伸强度得到了很好的保持。
A novel illite with beta-nucleation ability toward iPP has been prepared through decoration the pristine illite with CaHA, i.e. CaHA-illite. The crystallization behavior and mechanical property of the iPP/CaHA-illite composite were studied. For comparison, the composites were also made simply by adding different components simultaneously into iPP matrix during mixing in a miniextruder. The results show that, due to the opposite nucleation ability of illite and CaHA, the illite inhibits the beta crystallization whereas the CaHA promotes the beta crystallization of iPP. The CaHA-illite is very efficient for inducing the beta crystallization of iPP. Its efficiency is higher than any of the other samples. Due to the high crystallinity and beta iPP crystal fraction, the iPP/CaHA-illite exhibits the best mechanical properties with an increase of 36% in tensile modulus, 163% in maximum strain, and 69% in nonnotched impact strength. Meanwhile, the tensile strength of pure iPP has been well maintained.