CAJ | 학술논문

利用反应挤出法制备了长链支化聚丙烯，采用旋转流变仪和毛细管流变仪对纯聚丙烯及其改性聚丙烯进行测试，用流变学理论进行表征。结果表明，聚丙烯加入支化剂后，产生了长支链，分子量增大，分子量分布变宽；在一定范围内，随着支化剂量的增大，其支化程度增加；在低频处，能模量G'比损耗模量G"对长支链的出现及量变更敏感；加入支化剂后熔体强度明显增大，且支化的程度越高熔体强度越大，可拉伸性变小，能有效地改善材料的加工性能。
이용반응제출법제비료장련지화취병희，채용선전류변의화모세관류변의대순취병희급기개성취병희진행측시，용류변학이론진행표정。결과표명，취병희가입지화제후，산생료장지련，분자량증대，분자량분포변관；재일정범위내，수착지화제량적증대，기지화정도증가；재저빈처，능모량G'비손모모량G"대장지련적출현급량변경민감；가입지화제후용체강도명현증대，차지화적정도월고용체강도월대，가랍신성변소，능유효지개선재료적가공성능。
The long chain branched polypropylene was achieved by reactive extrusion method.The pure polypro-pylene ( PP) and modified PP were tested by rotary rheometer and capillary rheometer,and were characterized with rheological theory.The results has been proved that the polypropylene produced a long branches chain,the molecu-lar weight was increased and the molecular weight distribution was broadened by using branched agent. Within the limits of a certain range,It was also found that the degree of branching was increased along with the increase of branched agent.The G' was highly sensitive than G' to the degree of branching at low frequency.There is a higher melt strength of polypropylene by using branched agent, the higher degree of branching the higher melt strength while the tensile strength was decreased. It can effectively improve the processing performance of materials.