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Influence of Annealing on Microstructure and Mechanical Properties of Isotactic Polypropylene with beta-Phase Nucleating Agent

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WOS被引频次:151
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成果类型:
期刊论文
作者:
Bai, Hongwei;Wang, Yong*;Zhang, Zhijie;Han, Liang;Li, Yanli;Liu, Li;Zhou, Zuowan;Men, Yongfeng
通讯作者:
Wang, Yong
作者机构:
[Han, Liang; Liu, Li; Zhou, Zuowan; Bai, Hongwei; Wang, Yong; Li, Yanli] SW Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Sch Mat Sci & Engn, Chengdu 610031, Sichuan, Peoples R China.
[Zhang, Zhijie; Men, Yongfeng] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Grad Sch, Changchun 130022, Peoples R China.
[Wang, Yong] SW Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Sch Mat Sci & Engn, Erhuan Rd,North 1,111, Chengdu 610031, Sichuan, Peoples R China.
通讯机构:
[Wang, Yong] SW Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Sch Mat Sci & Engn, Erhuan Rd,North 1,111, Chengdu 610031, Sichuan, Peoples R China.
语种:
英文
期刊:
MACROMOLECULES
ISSN:
0024-9297
年:
2009
卷:
42
期:
17
页码:
6647–6655
文献类别:
WOS:Article
所属学科:
ESI学科类别:化学;WOS学科类别:Polymer Science
入藏号:
基金类别:
Program for New Century Excellent Talents in University [NCET-08-0823]; Sichuan Youthful Science and Technology Foundation [07ZQ026-003]
机构署名:
本校为第一且通讯机构
院系归属:
材料科学与工程学院
摘要:
The 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.
参考文献:
ABOULFARAJ M, 1995, POLYMER, V36, P731, DOI 10.1016/0032-3861(95)93102-R
Alamo RG, 1999, POLYMER, V40, P3933, DOI 10.1016/S0032-3861(98)00613-2
ALBEROLA N, 1995, J MATER SCI, V30, P1187, DOI 10.1007/BF00356118
Bai HW, 2008, J POLYM SCI POL PHYS, V46, P1853, DOI 10.1002/polb.21520
Bai HW, 2008, POLYM ENG SCI, V48, P1532, DOI 10.1002/pen.21125

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