论文部分内容阅读
研究了多价态元素铁、锡、锰的有机化合物对低密度聚乙烯 ( LDPE)在堆肥温度下的催化降解作用 .通过对降解前后样品的力学性能、分子量、氢过氧化物 ( POOH)浓度进行测试 ,证明所采用的有机金属化合物能有效促进堆肥温度下 PE的降解 .薄膜样品在降解 6 0 d后物性明显劣化 ,粘均分子量大幅度降低 ,而样品内 [POOH]的高低能够在一定程度上反映 L DPE降解速度的快慢 ,保持较高 [POOH]值的样品降解较快 ;F T-IR和 DSC分析结果表明 ,试样中羰基含量和结晶度均随降解时间的延长而升高 .
The catalytic degradation of low density polyethylene (LDPE) at composting temperature was studied by means of the organic compounds of multivalency elements iron, tin and manganese. The mechanical properties, molecular weight, concentration of hydroperoxide (POOH) The results showed that the organometallic compounds can effectively promote the degradation of PE at composting temperature.The physical properties of the film samples were significantly degraded after 60 days of degradation and the viscosity average molecular weight was greatly reduced while the level of [POOH] The degree of degradation of LDPE reflected the speed of LDPE, maintaining a higher [POOH] value of the sample degradation faster; F T-IR and DSC analysis showed that the sample carbonyl content and crystallinity both increased with the degradation time .