摘要
聚甲醛(POM)是一种受热易分解高分子材料。聚甲醛的共聚合催化剂由三氟化硼与醋酸丁酯组合的络合物,催化剂中微量低分子醋酸丁酯的残留,在加工过程中会对聚甲醛热稳定性造成影响,从而降低聚甲醛的力学性能。试验室按照催化剂引入的醋酸丁酯的含量模拟了微量醋酸丁酯对聚甲醛弯曲模量影响规律。以催化剂中带入的醋酸丁酯量为基础,当在聚合物添加醋酸丁酯使其浓度增加至5倍、10倍、20倍、30倍,聚甲醛弯曲模量明显下降。醋酸丁酯含量微量增加至2倍、3倍、4倍、5倍时,即醋酸丁酯含量由26.9 ppm增至134 ppm,弯曲模量也有下降。根据拟合曲线结果表明,按照天野目前的生产工艺,系统内引入醋酸丁酯的量,导致产品弯曲模量降低约10 MPa。
The polyoxymethylene (POM) is a kind of poor thermal stability polymer. The butyl acetate that bring in by the catalyst will influence the thermal stability of polyoxymethylene (POM). We studied the regulation of how the butyl acetate effect on the bending modulus of the POM in laboratory. The result showed that when the quantity of butyl acetate is 5,10,20,30 times than the catalyst,the bending modulus of POM decrea- ses obvious, when the quantity of butyl acetate is 2,3,4,5 times than the catalyst, the bending modulus of POM also decreases.
出处
《塑料助剂》
2016年第2期32-35,共4页
Plastics Additives
关键词
聚甲醛
醋酸丁酯
弯曲模量
polyoxymethylene (POM)
butyl acetate
bending modulus