TPU对PET力学性能及电镀性能的影响

Influence of TPU on the Mechanical Properties and Electroplating Properties of PET

目的为拓展聚对苯二甲酸(PET)在表面喷涂或电镀包装领域的应用提供一种可行的研究方法。方法从PET韧性、表面电镀性能差等自身特性出发,采用弹性体热塑性聚氨酯弹性体(TPU)和聚乙烯辛烯共弹性体(POE)对PET进行共混改性,提升PET的韧性和表面极性。结果当TPU和接枝POE的质量分数分别达到3%和20%时,PET的缺口冲击强度可达到31.49 kJ/m^(2),提升了5倍,且PET制品的表面达因值由原来的32提升到了40。结论弹性体TPU和接枝POE的引入,改变了PET分子链的内部排列结构,使得支链增加,且增加了PET表面的极性基团,从而提升了其表面能。

The paper aims to provide a feasible research method for expanding the application of polyethylene te-rephthalic acid(PET)in the field of surface spraying or electroplating packaging.Starting from its own characteristics such as poor toughness and poor surface electroplating performance,elastomer thermoplastic polyurethane elastomer(TPU)and polyethylene octene co-elastomer(POE)are used to blend and modify PET to improve the toughness and sur-face polarity of PET.When the addition amount of TPU and grafted POE reaches 3%and 20%,the notched impact strength of PET can reach 31.49 kJ/m^(2),which is increased by 5 times,and the surface dyne value of PET products in-creases from 32 to 40.The introduction of elastomer TPU and grafted POE can change the internal arrangement structure of PET molecular chains,increase the branched chains,and increase the polar groups on the PET surface,so as to increase its surface energy.