ICCAS OpenIR
Influence of Annealing on Microstructure and Mechanical Properties of Isotactic Polypropylene with beta-Phase Nucleating Agent
Bai, Hongwei1; Wang, Yong1; Zhang, Zhijie2; Han, Liang1; Li, Yanli1; Liu, Li1; Zhou, Zuowan1; Men, Yongfeng2
2009-09-08
Source PublicationMACROMOLECULES
ISSN0024-9297
Volume42Issue:17Pages:6647-6655
AbstractThe microstructure and mechanical properties of beta-nucleated iPP before and after being annealed at different temperatures (90-160 degrees C) have been analyzed, Annealing induced different degrees of variation in fracture toughness of beta-nucleated iPP samples. namely, slight enhancement at relatively low annealing temperatures (< 110 degrees C) and great improvement at moderate temperatures (120-130 degrees C), whereas dramatic deterioration at relatively high temperatures ( > 140 degrees C) has been observed. The variation of fracture toughness of beta-nucleated iPP is observed to be dependent on the content of beta-NA. Experiments, including scanning electronic microscope (SEM), wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), and dynamic mechanical analysis (DMA), are performed to study the variations of microstructures as well as the toughening mechanism of the beta-nucleated iPP after being annealed. The results indicate that the decreased number of chain segments in the amorphous region and the formation of microvoids, which is easily triggered by the secondary crystallization at 120-130 degrees C, are mainly responsible for the great improvement of toughness through promoting the lamellae to slip or elongate along the impact direction and inducing the intense plastic deformation during the fracture process.
DOI10.1021/ma9001269
Indexed BySCI
Language英语
WOS IDWOS:000269635900040
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:158[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/67534
Collection中国科学院化学研究所
Corresponding AuthorWang, Yong
Affiliation1.SW Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Sch Mat Sci & Engn, Chengdu 610031, Sichuan, Peoples R China
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Grad Sch, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Bai, Hongwei,Wang, Yong,Zhang, Zhijie,et al. Influence of Annealing on Microstructure and Mechanical Properties of Isotactic Polypropylene with beta-Phase Nucleating Agent[J]. MACROMOLECULES,2009,42(17):6647-6655.
APA Bai, Hongwei.,Wang, Yong.,Zhang, Zhijie.,Han, Liang.,Li, Yanli.,...&Men, Yongfeng.(2009).Influence of Annealing on Microstructure and Mechanical Properties of Isotactic Polypropylene with beta-Phase Nucleating Agent.MACROMOLECULES,42(17),6647-6655.
MLA Bai, Hongwei,et al."Influence of Annealing on Microstructure and Mechanical Properties of Isotactic Polypropylene with beta-Phase Nucleating Agent".MACROMOLECULES 42.17(2009):6647-6655.
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