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
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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 |
DOI | 10.1002/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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