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Thermal strain-induced cold crystallization of amorphous poly(lactic acid)
Zhou, CB; Li, HF; Zhang, WY; Li, JQ; Huang, SY; Meng, YF; Christiansen, JD; Yu, DH; Wu, ZH; Jiang, SC; Wu ZH(吴忠华)
2016
Source PublicationCRYSTENGCOMM
ISSN1466-8033
Volume18Issue:18Pages:3237-3246
SubtypeArticle
AbstractThe cold crystallization behaviors and structure evolutions of amorphous PLA stretched within a high-temperature range (100-150 degrees C) were investigated via in situ synchrotron WAXS and SAXS measurements. The PLA stretched at 120 degrees C exhibits excellent mechanical properties with the highest modulus, stretching strength and moderate elongation, which is attributed to the coordination effect of thermally-induced initial crystallinity and moderate chain segment mobility. The WAXS results showed that the diffraction peaks of (200/110) and (203) planes shift to higher 2 theta values, which indicates the formation of more ordered alpha' and a forms during PLA stretching within 100-150 degrees C. More a forms can be formed from the stretched a' form and/or from the amorphous phase at 100 degrees C. The phase diagram of a and a' forms in stretched PLA with stretching temperature was proposed according to the obtained data of lattice spacing. The crystallinity of stretched PLA increases faster than that which underwent quiescent cold crystallization at the same temperature. The SAXS results indicated that the long period and lamellar thickness along and vertical to the stretching direction of PLA stretched within 100-150 degrees C exhibit distinct variations, which is attributed to the difference of strain-induced crystallization and lamellar orientation.
DOI10.1039/c6ce00464d
Indexed BySCI
Language英语
WOS IDWOS:000375688800011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/248029
Collection多学科研究中心
Recommended Citation
GB/T 7714
Zhou, CB,Li, HF,Zhang, WY,et al. Thermal strain-induced cold crystallization of amorphous poly(lactic acid)[J]. CRYSTENGCOMM,2016,18(18):3237-3246.
APA Zhou, CB.,Li, HF.,Zhang, WY.,Li, JQ.,Huang, SY.,...&吴忠华.(2016).Thermal strain-induced cold crystallization of amorphous poly(lactic acid).CRYSTENGCOMM,18(18),3237-3246.
MLA Zhou, CB,et al."Thermal strain-induced cold crystallization of amorphous poly(lactic acid)".CRYSTENGCOMM 18.18(2016):3237-3246.
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