摘要
聚乙烯(PE)、马来酸酐(MAH)和过氧化二异丙苯(DCP)在溶液中反应,其产物经多次纯化和红外光谱分析证明,MAH以化学键连接到PE分子链上,接枝率达0.5MAH/100E,即相当于平均每个PE上接枝有10个MAH。用不同接枝率的聚乙烯接枝马来酸酐共聚物(PE-MAH)作为极性差别较大的PE和丁腈橡胶(NBR)的相容剂,分别研究其接枝率和用量对共混物的拉伸强度和低温冲击强度的影响,结果发现:PE-MAH增加了PE/NBR的相容性。低温脆断面的扫描电子显微镜观察清楚地反映出PE-MAH的增容作用。本文还提出了增容模型。
Polyethylene (PE), maleic anhydride (MAH) and dicumyl peroxide (DCP) reacted in solution, and the product was analysed by infrared spectrum after refining many times, it was proved that PE molecular backbone grafted MAH by chemical bond, the graft ratio was 0.5 MAH/100E or average 10 MAH per PE. PE-MAH with different graft ratio was used as compatibilizer of PE and NBR, and the influence of graft ratio and usage of the compatibilizer on tensile strenth and low-temperature impact strength of the blend was studied. It was found that PE-MAH increased the compatibility of PE/NBR. Observing the low temperature brittle fracture face of PE/NBR by electron scanning microscope, the compatibilization of PE-MAH was reflected clearly. A compatibilizing model also was introduced.
出处
《现代塑料加工应用》
CAS
1995年第3期33-36,共4页
Modern Plastics Processing and Applications
