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The influence of variant PE-b-PEO segments on physical properties of LLDPE graft copolymers
Li, Lili1,2; Yin, Jinghua1,2; Costa, Giovanna3; Stagnaro, Paola3
2008-03-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
ISSN0887-6266
Volume46Issue:5Pages:506-515
AbstractA 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.
KeywordDynamic Rheology Graft Copolymers Linear Low-density Polyethylene Pe-b-peo Thermal Properties
DOI10.1002/polb.21384
Indexed BySCI
Language英语
WOS IDWOS:000253737500008
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/65466
Collection中国科学院化学研究所
Corresponding AuthorYin, Jinghua
Affiliation1.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
Recommended Citation
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.
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