ICCAS OpenIR
Time evolution of phase structure and corresponding mechanical properties of iPP/PEOc blends in the late-stage phase separation and crystallization
Pang, Yongyan; Dong, Xia; Zhao, Ying; Han, Charles C.; Wang, Dujin
2007-10-05
Source PublicationPOLYMER
ISSN0032-3861
Volume48Issue:21Pages:6395-6403
AbstractA typical toughened polymeric alloy system, isotactic polypropylene (iPP)/poly(ethylene-co-octene) (PEOc) blend, was selected in this study to investigate the influence of phase separation and crystallization on the final mechanical properties of the polyolefin blend. The time dependence of the morphology evolution of this iPP/PEOc blend with different compositions was annealed at both 200 and 170 degrees C and investigated with scanning electron microscopy (SEM) and phase contrast optical microscopy (PCOM). It was found that under the above two phase separation temperatures, the domain size of iPP80/PEOc-20 (PEOc-20) increases only slightly, while the structure evolution of iPP60/PEOc-40 (PEOc-40) is quite prominent. The tensile tests revealed that the mechanical properties of PEOc-20, including break strength and elongation at break decrease only in a very small amount, while those of PEOc-40 are depressed obviously with phase separation time. The decrease of interphase and a sharper boundary resulting from domain coarsening during the late-stage phase separation are responsible for the poor tensile properties. It is believed that the composition, the annealing time and the processing temperatures all contribute to the morphology evolution and the consequent mechanical properties of iPP/PEOc blends, furthermore, the crystallization procedure is another crucial factor influencing the ultimate mechanical properties of the investigated blends. (c) 2007 Elsevier Ltd. All rights reserved.
KeywordPolypropylene/poly(Ethylene-co-octene) Blend Morphology Evolution Mechanical Property
DOI10.1016/j.polymer.2007.08.032
Indexed BySCI
Language英语
WOS IDWOS:000250492000025
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/62312
Collection中国科学院化学研究所
Corresponding AuthorDong, Xia
Affiliation1.Chinese Acad Sci, Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Pang, Yongyan,Dong, Xia,Zhao, Ying,et al. Time evolution of phase structure and corresponding mechanical properties of iPP/PEOc blends in the late-stage phase separation and crystallization[J]. POLYMER,2007,48(21):6395-6403.
APA Pang, Yongyan,Dong, Xia,Zhao, Ying,Han, Charles C.,&Wang, Dujin.(2007).Time evolution of phase structure and corresponding mechanical properties of iPP/PEOc blends in the late-stage phase separation and crystallization.POLYMER,48(21),6395-6403.
MLA Pang, Yongyan,et al."Time evolution of phase structure and corresponding mechanical properties of iPP/PEOc blends in the late-stage phase separation and crystallization".POLYMER 48.21(2007):6395-6403.
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