磷酸盐玻璃／聚丙烯复合材料的结晶行为和力学性能

摘要

Phosphate glass （P-glass）/polypropylene （PP） composites were prepared. The effects of P-glass with different glass transition temperature （Tg） on the crystalline and mechanical properties of PP matrix were studied. The experimental results show that the crystallization temperature of the PP matrix was markedly increased by adding P-glass, in which P-glass with low-rig plays a crucial role in the heterogeneous nucleation process of PP. The addition of low- Tg P- glass leads to the formation of 13 crystals and obvious improvement in toughness. The elongation at break of the composites increases from 427% to 545%, and the impact strength increases from 18.6 kJ/m2 to 36.8 kJ/m2.%制备了两种不同玻璃化温度的磷酸盐玻璃（P—glass），研究了P—glass对聚丙烯（PP）基体结晶行为和力学性能的影响。结果表明，P—glass在PP中具有异相成核作用，使PP的结晶温度升高。具有较低玻璃化温度（176℃）的P—glass，能诱导生成口晶，使p-glass／PP复合材料的断裂伸长率与纯PP相比从427％提高至545％，而冲击强度则由18．6kJ／m2提高至36．8kJ／m2，材料的韧性得以显著改善。