合成树脂及塑料
閤成樹脂及塑料
합성수지급소료
CHINA SYNTHETIC RESIN AND PLASTICS
2014年
2期
10-12
,共3页
高熔体强度聚丙烯%乙烯基不饱和硅烷%交联%二乙烯基苯
高鎔體彊度聚丙烯%乙烯基不飽和硅烷%交聯%二乙烯基苯
고용체강도취병희%을희기불포화규완%교련%이을희기분
high melt strength polypropylene%unsaturated vinyl silane%crosslinking%divinylbenzene
采用乙烯基不饱和硅烷接枝交联复合改性聚丙烯（PP）制备高熔体强度聚丙烯（HMSPP）。由正交试验可知，过氧化二苯甲酰对乙烯基长链不饱和硅烷交联改性PP制备的HMSPP熔体强度的影响最显著。通过优化实验得到的HMSPP熔体强度为19.9cN。二乙烯基苯（DVB）作为助交联剂可有效提高HMSPP的熔体强度，w（DVB）不宜超过1.0%。苯乙烯质量分数为1.0%时，对HMSPP链断裂抑制较明显。采用复合改性PP制备的HMSPP的断裂拉伸应变略有下降，熔体强度相比PP提高4.7倍，悬臂梁缺口冲击强度提高0.82倍。
採用乙烯基不飽和硅烷接枝交聯複閤改性聚丙烯（PP）製備高鎔體彊度聚丙烯（HMSPP）。由正交試驗可知，過氧化二苯甲酰對乙烯基長鏈不飽和硅烷交聯改性PP製備的HMSPP鎔體彊度的影響最顯著。通過優化實驗得到的HMSPP鎔體彊度為19.9cN。二乙烯基苯（DVB）作為助交聯劑可有效提高HMSPP的鎔體彊度，w（DVB）不宜超過1.0%。苯乙烯質量分數為1.0%時，對HMSPP鏈斷裂抑製較明顯。採用複閤改性PP製備的HMSPP的斷裂拉伸應變略有下降，鎔體彊度相比PP提高4.7倍，懸臂樑缺口遲擊彊度提高0.82倍。
채용을희기불포화규완접지교련복합개성취병희（PP）제비고용체강도취병희（HMSPP）。유정교시험가지，과양화이분갑선대을희기장련불포화규완교련개성PP제비적HMSPP용체강도적영향최현저。통과우화실험득도적HMSPP용체강도위19.9cN。이을희기분（DVB）작위조교련제가유효제고HMSPP적용체강도，w（DVB）불의초과1.0%。분을희질량분수위1.0%시，대HMSPP련단렬억제교명현。채용복합개성PP제비적HMSPP적단렬랍신응변략유하강，용체강도상비PP제고4.7배，현비량결구충격강도제고0.82배。
High melt strength polypropylene (HMSPP) was prepared from grafting and crosslinking modification of polypropylene (PP) with unsaturated vinyl silane. The orthogonal experiments show that benzoyl peroxide has the most significant effect on the melt strength of HMSPP based on crosslinking modification of PP with long chain unsaturated vinyl silane, and the melt strength of HMSPP obtained through optimum experiment is 19.9 cN. Divinylbenzene (DVB) as a crosslinking agent can effectively improve the melt strength of HMSPP, and the mass fraction of DVB should be less than 1.0%. Styrene inhibits HMSPP chain rupture obviously when its mass content is 1.0%. When HMSPP is prepared by PP modification, the tensile strain at break decreases slightly, the melt strength increases by 4.7 times, and the notched Izod impact strength increases by 0.82 times in comparison with those of PP.
