| LH-PP/Nano-clay共混挤出的发泡成型 |
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| 引用本文： | 王明义,纪莲清,马军,周南桥.LH-PP/Nano-clay共混挤出的发泡成型[J].高分子材料科学与工程,2011(7):114-117. |
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| 作者姓名： | 王明义 纪莲清 马军 周南桥 |
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| 作者单位： | 郑州轻工业学院机电工程学院;华南理工大学聚合物成型加工工程教育部重点实验室华南理工大学聚合物新型成型装备国家工程研究中心 |
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| 基金项目： | 郑州轻工业学院博士科研基金资助(2010BSJJ004) |
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| 摘 要： | 以超临界CO2为发泡剂,马来酸酐接枝改性聚丙烯（PP-g-MAH）为相容剂,使用单螺杆挤出发泡系统研究了线性均聚聚丙烯（LH-PP）/纳米粘土（Nano-clay）共混物的发泡成型过程,研究了口模温度和共混配方对发泡样品膨胀率、泡孔密度以及口模压力的影响。研究发现,Nano-clay和PP-g-MAH的加入提高了LH-...
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| 关 键 词： | 聚丙烯 纳米粘土 挤出发泡 超临界二氧化碳 |
Extrusion Foaming of Linear Polypropylene Homopolymer/Nano-Clay Blends |
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| Mingyi Wang,Lianqing Ji,Jun Ma,Nanqiao Zhou.Extrusion Foaming of Linear Polypropylene Homopolymer/Nano-Clay Blends[J].Polymer Materials Science & Engineering,2011(7):114-117. |
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| Authors: | Mingyi Wang Lianqing Ji Jun Ma Nanqiao Zhou |
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| Affiliation: | 1.Mechanical and Electrical Engineering Institute,Zhengzhou University of LightIndustry,Zhengzhou 450002,China;2.Key Laboratory of Polymer Processing Engineering,Ministry of Education,National Engineering Research Center of Novel Equipment forPolymer Processing,South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | Foaming process of linear polypropylene homopolymer(LH-PP)/nano-clay blends was investigated using a single extruder foaming system,with supercritical carbon dioxide as the foaming agent and maleic anhydride grafted polypropylene(PP-g-MAH) as the coupling agent.Influences of die temperature and blending formulation on foam expansion ratio,cell-population density and die pressure were analyzed.Result shows the addition of nano-clay and PP-g-MAH increases the maximum expansion ratio of foamed samples obtained.Compared with pure LH-PP,the addition of nano-clay and PP-g-MAH decreases the foaming temperature of LH-PP/nano-clay/PP-g-MAH blends as maximum expansion ratio is achieved.In addition,we found the curve of the final expansion ratio of PP foam vs.temperature shows a typical mountain shape for each formulation,indicating that gas loss and crystallization stiffening of the melt at low temperature are the two governing factors influencing foam expansion ratio of semi-crystalline polymers. |
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| Keywords: | polypropylene nano-clay extrusion foaming supercritical carbon dioxide |
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