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| 二次开模距离对微发泡聚丙烯材料发泡行为的影响 | |
| 引用本文： | 龚维,何颖,张纯,朱建华,何力. 二次开模距离对微发泡聚丙烯材料发泡行为的影响[J]. 塑料科技, 2011, 39(12) |
| 作者姓名： | 龚维 何颖 张纯 朱建华 何力 |
| 作者单位： | 1. 贵州师范大学材料与建筑工程学院,贵州贵阳550014;国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 2. 贵州师范大学材料与建筑工程学院,贵州贵阳,550014 3. 国家复合改性聚合物材料工程技术研究中心,贵州贵阳,550014 |
| 基金项目： | 贵州省工业攻关项目(黔科合GY字(2011)3011); 国家973前期项目(2007CB616912) |
| 摘 要： | 采用化学发泡注塑成型技术,在二次开模条件下制备微发泡聚丙烯(PP)材料;通过热力学分析法研究了二次开模距离对PP微发泡材料发泡行为的影响。结果表明:二次开模距离能有效地控制PP材料的发泡过程,二次开模距离越小,体系的发泡过程越容易自发进行。当二次开模距离L=5.3 mm时,体系中的吉布斯自由能小于零,发泡过程不可能自发进行;二次开模距离L=4.3 mm时,PP体系的发泡质量最理想,泡孔平均直径为21.6 m,泡孔密度为5.63×106个/cm3,能够获得泡孔细小、均匀的微发泡PP材料。 |
| 关 键 词： | 聚丙烯 二次开模距离 发泡行为 化学发泡 |
Effect of Twice-open Mold Distance on Micro-foaming Behavior of Polypropylene Material |
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| Gong Wei,He Ying,Zhang Chun,hu Jianhua,He Li. Effect of Twice-open Mold Distance on Micro-foaming Behavior of Polypropylene Material[J]. Plastics Science and Technology, 2011, 39(12) | |
| Authors: | Gong Wei He Ying Zhang Chun hu Jianhua He Li |
| Affiliation: | Gong Wei1,2,He Ying1,Zhang Chun2,Zhu Jianhua2,He Li2 1 School of Material and Architectural Engineering,Guizhou Normal University,Guiyang 550014,China 2 National Engineering Research Center for Compounding and Modifi cation Polymeric Materials,China |
| Abstract: | By taking chemical foaming injection molding technology,the microcellular foam polypropylene(PP) materials were made under the condition of twice-open mold.The effect of different twice-open mold distance on foaming behavior of PP materials was analyzed by means of thermodynamic analysis.The results show that twice-open mold distance can effectively control foaming process of PP materials,the smaller twice-open mold distance,the easier spontaneously;when L is 4.3 mm,there is an ideal foaming effect in micro... |
| Keywords: | Polypropylene Twice-open mold distance Foaming behavior Chemical foaming |
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