熔融接枝聚烯烃相容剂的制备与性能研究-材料科学与工程专业毕上业论文.docxVIP

北京化工大学硕士学位论文量为20份时，合金的力学性能最佳。PP—g-MAH和PP—g—GMA都能 北京化工大学硕士学位论文 量为20份时，合金的力学性能最佳。PP—g-MAH和PP—g—GMA都能 作为PP／PA6合金的有效增容剂，改善界面粘结情况。且用PP—g-MAH 和PP．g．GMA两种接枝物复合作为相容剂加入到共混物中比单独使 用一种的效果好。 最后，将PP和EVA同时与MAH和GMA接枝，制备复合基体 型相容剂，研究不同比例的PP／EVA接枝物对接枝率，熔体流动速率 等影响。发现PP／EVA的比例为50／50时，体系的性能最佳，但由于 副反应增多，接枝率下降。而熔融指数是随着体系中EVA组分的增 多而增大。接枝后体系的熔点和结晶温度都有上升。拉伸和弯曲强度 也有提升。扫描电镜图片显示，接枝后PP和EVA相容性得到改善， 大粒径颗粒明显变少。体系中加入GMA接枝的效果比MAH好，这 与单一基体接枝情况相同。 关键词：熔融接枝，聚烯烃，GMA，马来酸酐，PP／EVA复合基体型 相容剂 Ⅱ 万方数据 AbstractRESEARCH Abstract RESEARCH oN PREPARATIoN AND PRoPERTIS OF MEl月GRAFTING PoLYoLEFIN CoMIATILIZER ABSTRACT The compatibility of polyefins can be effectively enchanced with other polymer materials by melt grafting method，thus broadening the application of polyolefins．In this research，polyolefin-based compatilizers prepared by melt grafting to introduce into the polar／non—polar blend systems to validate the effectiveness of compatibilization and the mechanisms of compatibilization systematically investigated．Also， Compound matrix compatilizers were prepared and performances were researched． Firstly，a series of graft products were prepared by melt grafting method which had employed general polyolefins such as PP and PE were used as the matrix，DCP as the initiator and MAH or GMA as the monomers．The influences of graft monomer，C0-monomer，initiator， reaction temperature and screw type on the grafting rate and the products’ melt flow rate were respectively investigated the occurrence of GMA grafting reaction and showed that styrene，could improve graft as the second monomer．With the rise of loading of the graft monomer and the initiator，grafting yield first increased and then decreased．When the III 万方数据 万方数据 万方数据 laoding laoding of MAH，GMA and DCP were respectively 2．0 phr，4．0 phr and 0．08 phr，grafting yield met a peak．It was also found that the addition of styrene could furtherly improve the grafting yield and inhibit the side reactions．The best grafting effect was achieved when the loading ratio of the graft monome