不同种类环氧树脂对PA6/CaCl_2体系性能的影响

The Effect of Different Kinds of Epoxy Resin on Properties of Polyamide 6/Calcium Chloride Complex

利用熔融挤出法研究了两种不同环氧值的环氧树脂(E20,E06)对PA6/CaCl2复合体系的结晶、力学、耐热性能的影响。结果表明,在相同环氧树脂含量下,PA6/CaCl2/E20复合材料的熔融温度、起始结晶温度、结晶峰温度、结晶度大体上低于PA6/CaCl2/E06复合材料的值,PA6的结晶受限程度也较大。当EP含量为9份时,PA6/CaCl2/E20与PA6/CaCl2/E06复合材料的拉伸强度均达到最大值(92.7,87.0 MPa),与PA6/CaCl2(47.0 MPa)相比提高了97%和85%。当E20,E06含量分别为3份、5份时,PA6/CaCl2/EP复合材料的冲击强度分别达到最大值8.7,8.7 kJ/m2,与PA6/CaCl2(6.0 kJ/m2)相比提高了45%。另外,加入适量E20,E06后,复合材料耐热性能均有显著提高,且热稳定性降幅不大。综合得知,加入适量的环氧值较高的E20可以得到力学性能优良、耐热性能较好的PA6/CaCl2/E20复合材料。

The effects of different kinds of epoxy resin of E20 and E06 on the crystallization behavior,mechanical properties and heat-resistant properties of polyamide 6/calcium chloride complex were focused on through melting extrusion method. The results show that under the same content of epoxy resin（EP）,the melting temperature,initial crystallization temperature, crystallization temperature and crystallinity of PA6/CaCl2/E20 composites are substantially lower than that value of PA6/CaCl2/E06 composites,and the crystallization limitation extent of PA6 is bigger. When EP content reach 9 phr,tensile strength of PA6/CaCl2/E20 and PA6/CaCl2/E06 composites reaches maximum （92.7 and 87.0 MPa） respectively,which is raised to 97%and 85%compared with that PA6/CaCl2 composites （47.0 MPa）. When E20 and E06 content reach 3 phr and 5 phr,the impact strength（8.7 kJ/m2 and 8.7 kJ/m2） of PA6/CaCl2/E20 and PA6/CaCl2/E06 are all raised to 45%compared with that of PA6/CaCl2 composites （6.0 kJ/m2）. After adding suitable amount of E20 and E06,heat resistance of composites are significantly improved,and the declining extent of thermal stability is small. In conclusion,under suitable amount of E20,PA6/CaCl2/E20 composite has the better mechanical and heat-resistant properties.