二环[2.2.1]庚烷二羧酸盐对聚丙烯的成核效果

考察了不同添加量的二环2.2.1]庚烷二羧酸盐（HPN-68）成核剂对均聚聚丙烯的成核效果，研究了HPN-68对聚丙烯的力学性能、结晶行为的影响。结果表明，成核剂HPN-68在聚丙烯中起到结晶增长点的作用，使结晶细化。结晶的细化给聚合物带来了性能上的变化。因而聚丙烯的冲击强度略有下降，而其他力学性能包括弯曲强度、弹性模量和拉伸强度均有提高，增幅分别为21%、25%和5.6%；热变形温度也提高19℃，结晶峰温度从119℃提高到136℃。因HPN-68是聚丙烯优良的增刚成核剂。

Investigation of the nucleating effect of bicyclic [2.2.1] heptane di-carboxylate on polypropylene

The nucleating effects of varying amounts of bicyclic 2.2.1] heptane di-carboxylate (HPN-68) on the mechanical properties and crystallization of polypropylene (PP) have been investigated. It was found that the nucleating agent HPN-68 played a role as a crystallization growth point, which controlled the volume of crystallization and led to an enhancement in the properties of PP. The flexural strength, elasticity modulus and tensile strength of PP were increased by 21%, 25% and 5.56% respectively; there was a decline in impact strength however. The peak temperature of crystallization was increased from 119℃ to 136℃, and the thermal distortion temperature was raised by 19℃. These results showed that HPN-68 is an excellent nucleating agent for enhancing the rigidity of PP.