磷酸酯盐类成核剂对煤基抗冲共聚聚丙烯K8708结晶和力学性能的影响研究  

Effect of phosphate nucleating agents on crystallization and mechanical properties of coal⁃based impact⁃resistant copolymerization⁃type polypropylene K8708

作　　者：黄起中 HUANG Qizhong(CHN Energy Shenhua Yulin Energy Chemical Co,Ltd,Yulin 719000,China)

机构地区：[1]国家能源集团国能榆林化工有限公司,陕西榆林719000

出　　处：《中国塑料》2025年第1期19-24,共6页China Plastics

摘　　要：通过两种磷酸酯羟基铝盐成核剂NA-21和TD-531对煤基抗冲共聚聚丙烯K8708结晶过程的影响研究,实现抗冲共聚聚丙烯的力学性能调控。结果表明,两种成核剂均为聚丙烯(PP)α型成核剂,可显著提高PP的结晶峰温度和结晶成核密度,进而加速其整体结晶速率,实现其刚性和加工效率的双提升。其中成核剂TD-531相对于NA-21对PP性能提升的作用更为明显,在添加量仅为0.075%时,不仅可使PP的结晶峰温度和半结晶时间分别提升和降低至131.8℃和0.35 min,相对于空白PP分别提高10.0℃和降低5.48 min;同时,使得PP的弯曲模量和冲击强度分别提升到1 377 MPa和68.9 kJ/m^(2),相对于空白PP分别提升330 MPa和22.3 kJ/m^(2),体现出优良的刚韧平衡作用,此作用与此成核剂优良的分散性能密切相关。The effect of two types of phosphate ester hydroxyaluminum salt nucleating agents,NA-21 and TD-531,on the crystallization process of coal-based impact-resistant copolymerization-type polypropylene(PP)was investigated,re-alizing the regulation of the mechanical properties of the PP.The results indicated that both of the nucleating agents could act asα-Type nucleating agents for the PP to significantly increase its crystallization peak temperature and nucle-ation density,thus accelerating the overall crystallization rate of the PP and improving its rigidity and processing efficien-cy.TD-531 generated a more significant effect on improving the performance of the PP in contrast to NA-21.When the addition amount of TD-531 was only 0.075%,the crystallization peak temperature of the PP increased to 131.8℃,its semi-crystallization time decreased to 0.35 min.Compared to those of pure PP,the crystallization peak temperature in-crease by 10℃and the semi-crystallization time decreased by 5.48 min.Meanwhile,the flexural modulus and impact strength of the PP increased to 1377 MPa and 68.9 kJ/m^(2),respectively,which were increased by 330 MPa and 22.3 kJ/m^(2),respectively,compared to those of pure PP.This demonstrated a good balance between the rigidity and toughness thanks to a good dispersion effectiveness of the nucleating agent.

关 键 词：磷酸盐成核剂 煤基聚丙烯 结晶性能 力学性能 刚韧平衡 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]