| 剪切应力场中聚丙烯熔体在近熔点处冷却结晶的晶体结构研究 |
| |
| 引用本文： | 邓聪,高雪芹,王海文,申开智.剪切应力场中聚丙烯熔体在近熔点处冷却结晶的晶体结构研究[J].高分子学报,2010,0(4):490-495. |
| |
| 作者姓名： | 邓聪 高雪芹 王海文 申开智 |
| |
| 作者单位： | 四川大学分析测试中心高分子科学与工程学院高分子材料工程国家重点实验室,成都,610065 |
| |
| 基金项目： | 国家自然科学基金(基金号50903054,50803038,10590351);;四川大学青年科学基金(基金号2008008)资助项目 |
| |
| 摘 要： | 通过自主设计的动态保压注塑成型装置研究剪切应力场下聚丙烯(PP)熔体在近熔点处冷却结晶的晶体结构.用扫描电子显微镜(SEM)、示差扫描量热法(DSC)和广角X射线衍射(WAXD)分析了PP试样在近熔点处冷却后从表层到剪切层的结晶结构的变化.SEM研究表明,与传统注塑成型样品(SL)和剪切力场中高熔体温度下冷却得到的试样(DH)相比,近熔点附近冷却得到的PP试样(DL)从表层到剪切层的结晶结构和形态有明显变化.DL从表层到剪切层均生成了尺寸较大的取向结晶结构,无明显的串晶产生.DSC研究表明,与SL和DH相比,DL剪切层无脊纤维晶熔融峰且晶片熔融温度较高,证明其样品内部晶片尺寸较大.WAXD进一步研究显示,DL内部主要晶面(110,040和130)的结晶尺寸与SL和DH相比并没有发生明显改变.
|
| 关 键 词： | 结晶 剪切 聚丙烯 温度 |
| 收稿时间： | 2009-10-16 |
STUDIES ON THE CRYSTAL STRUCTURE OF POLYPROPYLENE OBTAINED BY COOLING MELT NEAR MELTING POINT UNDER SHEAR FLOW |
| |
| DENG Cong,GAO Xueqin,WANG Haiwen,SHEN Kaizhi.STUDIES ON THE CRYSTAL STRUCTURE OF POLYPROPYLENE OBTAINED BY COOLING MELT NEAR MELTING POINT UNDER SHEAR FLOW[J].Acta Polymerica Sinica,2010,0(4):490-495. |
| |
| Authors: | DENG Cong GAO Xueqin WANG Haiwen SHEN Kaizhi |
| |
| Institution: | Analytical and Testing Center;Department of Polymer Science and Engineering;State Key Laboratory of Polymer Materials Engineering;Sichuan University;Chengdu 610065 |
| |
| Abstract: | In order to study the crystal structure of polypropylene obtained by cooling melt near melting point under shear flow,samples were prepared by using a dynamic packing injection molding (DPIM) device which was designed by ourselves. With the aid of scanning electron microscopy ( SEM ),differential scanning calorimetry (DSC) and wide-angle x-ray diffraction (WAXD),crystal stuctures and morphologies were studied from skin to shear regions in these samples obtained by cooling melt near melting point under shear... |
| |
| Keywords: | Crystal Shear Polypropylene Temperature |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《高分子学报》浏览原始摘要信息 |
| 点击此处可从《高分子学报》下载免费的PDF全文 |
