PVC/MBS共混物紫外光交联与降解研究 Ⅰ .PVC/MBS共混物紫外光解脱HCl反应动力学研究

利用紫外可见光谱研究了PVC MBS共混体系紫外光解脱HCl动力学。PVC在紫外光照下脱HCl产生共轭双键(CHCH)n,n值越大的共轭双键数量越少。随着MBS加入量的增加,生成共轭双键的速率降低,表明MBS有抑制PVC脱HCl的作用。

PVC/MBS共混物的紫外光交联及光氧化反应

The photocrosslink and photooxidation reactions of PVC/MBS blends were investigated.The gel amount formed by PVC under UV-irradiation decreased with increasing of the amount of MBS.The results showed that MBS restrained the photocrosslink of PVC.The photooxidation rate of PVC increased with increasing of the amount of MBS,and it indicated that MBS accelerated the photooxidation of PVC under UV irradiation.