中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers

文献类型:期刊论文

作者Li, Lili1,2; Yin, Jinghua1,2; Costa, Giovanna3; Stagnaro, Paola3
刊名JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
出版日期2008-03-01
卷号46期号:5页码:506-515
关键词Dynamic Rheology Graft Copolymers Linear Low-density Polyethylene Pe-b-peo Thermal Properties
ISSN号0887-6266
DOI10.1002/polb.21384
英文摘要A method was adopted to fix a series of polymers of PE-b-PEO with different PEO/PE segments on the chains of LLDPE. Maleic anhydride (MA) reacting with hydroxyl group of PE-b-PEO (mPE-b-PEO) was used as the intermediate. The structures of intermediates and graft copolymers were approved by H-1 NMR and FTIR. XPS analysis revealed a great amount of oxygen on the surface of grafted copolymers although the end group of PEO was fixed on the LLDPE chains through MA. Thermal properties of the graft copolymers as determined by differential scanning calorimetry (DSC) showed that PE segments in the grafted monomers could promote the heterogeneous nucleation of the polymer, increase T., and crystal growth rate. While the amorphous PEO segments which attached to the crystalline PE segments in LLDPE, impaired their ability to fit the crystal lattice, and depressed the crystallization of LLDPE backbones. In this study, it was also verified through the dynamic rheological data that increasing M-n of grafted monomers significantly increased the complex viscosity and enhanced the shear-thinning behavior. Long-branched chains formed by grafted monomers enhanced the complex moduli (G' and G '') value and retarded relaxation rate. However, there were little influence on the rheological properties when increasing the amounts of PEO segments (or decreasing PE segments) of grafted monomers with similar molecular weight. (C) 2008 Wiley Periodicals, Inc.
语种英语
WOS记录号WOS:000253737500008
出版者JOHN WILEY & SONS INC
源URL[http://ir.iccas.ac.cn/handle/121111/65465]  
专题中国科学院化学研究所
通讯作者Yin, Jinghua
作者单位1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.CNR, Ist Studio Macromol, I-16149 Genoa, Italy
推荐引用方式
GB/T 7714
Li, Lili,Yin, Jinghua,Costa, Giovanna,et al. The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,2008,46(5):506-515.
APA Li, Lili,Yin, Jinghua,Costa, Giovanna,&Stagnaro, Paola.(2008).The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers.JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS,46(5),506-515.
MLA Li, Lili,et al."The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers".JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 46.5(2008):506-515.

入库方式: OAI收割

来源:化学研究所

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