IHEP OpenIR
Direct investigations of deformation and yield induced structure transitions in polyamide 6 below glass transition temperature with WAXS and SAXS
Guo, HL; Wang, JY; Zhou, CB; Zhang, WY; Wang, ZX; Xu, BH; Li, JQ; Shang, YR; Christiansen, JD; Yu, DH; Wu, ZH; Jiang, SC; Wang JY(王佳怡); Wu ZH(吴忠华)
2015
Source PublicationPOLYMER
ISSN0032-3861
EISSN1873-2291
Volume70Pages:109-117
SubtypeArticle
AbstractDeformation and yield induced structure transitions of polyamide 6 (PA6) were detected with the combination of the wide- and small-angle X-ray scattering (WAXS and SAXS) at 30 degrees C below glass transition temperature (T-g) of PA6. During deformation, gamma-alpha phase transition was found at elastic stage. The concentrated stress in crystals at elastic stage provided adequate energy for the direct gamma-alpha phase transition under T-g. The force to promote the gamma-phase into a phase directly is insufficient at the yield stage and a transient phase as a compromise was formed. The transient phase was confirmed by DSC measurements and assisted the gamma-alpha phase transition indirectly. The gamma-phase slips into incomplete fragments at yield point, and the parts along tensile direction are responsible for the formation of transient phase. The gamma-fragments after yield is oriented by shear force following alpha-phase. The yield of PA6 was intimately related with the gamma-transient phase transition and the slippage of gamma-fragments. In addition, the increase of long spacing at elastic deformation along tensile direction was mainly contributed by the amorphous region. After yield, the phase transition and crystalline slippage affected the lamellar evolution. A simplified schematic diagram was provided to illustrate the structure evolution of PA6. (C) 2015 Elsevier Ltd. All rights reserved.
KeywordDeformation of PA6 Structure transition below T-g WAXS and SAXS
Subject AreaPolymer Science
DOI10.1016/j.polymer.2015.06.013
Indexed BySCI ; EI
Language英语
WOS Research AreaPolymer Science
WOS SubjectPolymer Science
WOS IDWOS:000358005000014
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/228578
Collection中国科学院高能物理研究所
Recommended Citation
GB/T 7714
Guo, HL,Wang, JY,Zhou, CB,et al. Direct investigations of deformation and yield induced structure transitions in polyamide 6 below glass transition temperature with WAXS and SAXS[J]. POLYMER,2015,70:109-117.
APA Guo, HL.,Wang, JY.,Zhou, CB.,Zhang, WY.,Wang, ZX.,...&吴忠华.(2015).Direct investigations of deformation and yield induced structure transitions in polyamide 6 below glass transition temperature with WAXS and SAXS.POLYMER,70,109-117.
MLA Guo, HL,et al."Direct investigations of deformation and yield induced structure transitions in polyamide 6 below glass transition temperature with WAXS and SAXS".POLYMER 70(2015):109-117.
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