石油化工2017，Vol.46Issue(6)：678-684,7.DOI:10.3969/j.issn.1000-8144.2017.06.004
高流动抗冲聚丙烯专用料尺寸稳定性的流变学判定
Rheological determination of dimensional stability for high flow impact polypropylene special materials
娄立娟 1陈商涛 1王艳芳 1张凤波 1俞炜 2黄强1
作者信息
- 1. 中国石油石油化工研究院,北京102206
- 2. 上海交通大学化学化工学院,上海200240
- 折叠
摘要
Abstract
The issue on the determination and control of dimensional stability for several specimens of high flow impact polypropylene(PP) by means of rheology was discussed,and the corresponding rheological judgment method was established based on the estimation of rheological testing conditions.The effect of the processing time,the shear rate and the heating and cooling process during injection molding on the degree of phase separation and warping deformation was also evaluated.The experiment results suggest that the dimensional stability of injecting product is good when G*T at transition point on the vGP curve of PP melt is lower than 110 Pa,and it turns bad when G*T＞800 Pa,also it is neither when G*T lies between 110 Pa and 800 Pa.K9928 and K7726H prefer the low processing temperature and short processing time,while high processing temperature is suitable for K9928H and EP548R.Moreover,the phase separation of EP548R system and the final shrinkage and warpage of the injecting product can be controlled very well by means of increasing the external applied flow field.关键词
高流动抗冲聚丙烯/尺寸稳定性/收缩翘曲/流变学/控制Key words
high flow impact polypropylene/dimensional stability/shrinkage and warpage/rheology/control分类
化学化工引用本文复制引用
娄立娟,陈商涛,王艳芳,张凤波,俞炜,黄强..高流动抗冲聚丙烯专用料尺寸稳定性的流变学判定[J].石油化工,2017,46(6):678-684,7.
