[1]俞强,杨兴成,陈磊,等.i-PP/PPR流延膜的取向片晶结构和拉伸成孔性[J].常州大学学报(自然科学版),2016,(02):1-7.[doi:10.3969/j.issn.2095-0411.2016.02.001]
　YU Qiang,YANG Xingcheng,CHEN Lei,et al.Oriented Lamellar Structure of iPP/PPR Precursor Film and Its MicroporeForming Performance by Uniaxially Stretching[J].Journal of Changzhou University(Natural Science Edition),2016,(02):1-7.[doi:10.3969/j.issn.2095-0411.2016.02.001]
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i-PP/PPR流延膜的取向片晶结构和拉伸成孔性()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2016年02期
页码:
1-7
栏目:
材料科学与工程
出版日期:
2016-03-30

文章信息/Info

Title:
Oriented Lamellar Structure of iPP/PPR Precursor Film and Its MicroporeForming Performance by Uniaxially Stretching
作者:
俞强; 杨兴成; 陈磊; 沈鹏; 刘晶如
常州大学 材料科学与工程学院，江苏 常州 213164；江苏省光伏科学与工程协同创新中心，江苏 常州 213164
Author(s):
YU Qiang;  YANG Xingcheng;  CHEN Lei;  SHEN Peng;  LIU Jingru
School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China; Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou 213164, China
关键词:
聚丙烯流延膜; 微孔膜; 无规共聚丙烯; 取向片晶结构; 拉伸成孔性
Keywords:
polypropylene precursor film;  microporous membrane;  polypropylene random copolymer;  oriented lamellar structure;  microporeformation by stretching
分类号:
TQ 325.1
DOI:
10.3969/j.issn.2095-0411.2016.02.001
文献标志码:
A
摘要:
将全同立构聚丙烯（iPP）与无规共聚丙烯（PPR）熔融共混后在一定工艺条件下制备iPP/PPR共混流延膜，经过热处理后施加单向拉伸形成微孔膜，使用示差扫描量热仪（DSC）、傅立叶变换红外光谱（FTIR）和电子材料试验机表征流延膜的取向片晶结构和硬弹性能，通过扫描电镜（SEM）以及孔隙率、透气率测试表征微孔膜的孔结构，研究PPR含量对流延膜取向片晶结构以及拉伸成孔性的影响。结果表明，添加少量PPR可以促进流延膜中PP链段沿牵伸方向取向，从而在较低流延温度下形成完善的取向片晶结构，PPR中乙烯含量较多时，效果更加明显。添加较多PPR时其对结晶的稀释作用以及对链段松弛的促进作用使得流延膜的结晶度、晶区及非晶区取向程度下降。含少量PPR流延膜在120〖KG3x〗℃下热处理后的取向片晶结构与iPP流延膜在145〖KG3x〗℃下热处理后的取向片晶结构相当，其拉伸后形成的微孔膜具有较高的孔隙率和透气率。较高PPR含量下共混流延膜的拉伸成孔性变差，微孔膜的孔隙率和透气率下降。
Abstract:
Isotactic polypropylene (iPP) was blended with random copolymer of propylene and ethylene (PPR), and PP precursor films with different contents of PPR were prepared through a casting process, in order to investigate the influence of PPR on the oriented lamellar structure of PP casting film and the performance of micropore formation by uniaxially stretching. The oriented lamellar structure of the precursor was characterized by DSC, FTIR and mechanical properties. The pore structure and morphology of the microporous membrane was characterized by SEM and measurements of porosity and permeability. The results show that lower contents of PPR in the precursor film could enhance movement of PP segment, and promote chain orientation along drawing direction, giving rise to more perfect oriented lamellar structure in precursor film. However, higher contents of PPR in the precursor film led to the decreased crystallinity and orientation in both crystalline and amorphous regions, due to its dilution effect to the crystalline molecules and the promotion to segment relaxation. The oriented lamellar structure in the precursor film with lower contents of PPR and annealed at 120〖KG3x〗℃ was almost as perfect as in iPP precursor film that was annealed at 145〖KG3x〗℃. The microporous membrane obtained by stretching precursor film with lower contents of PPR had higher porosity and permeability. However, porosity and permeability of microporous membrane decreased, as PPR contents in the precursor film increased.

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备注/Memo

备注/Memo:
收稿日期：20151010。基金项目：江苏高校优势学科建设工程资助项目（苏学科办[2014]9）；江苏省产学研前瞻项目（BY2012093）。作者简介：俞强（1958—），男，江苏南京人，教授,主要从事聚合物材料功能化研究。
更新日期/Last Update: 2016-03-20