ICCAS OpenIR
An analysis of the correlation between structural anisotropy and dimensional stability for drawn poly(lactic acid) films
Smith, PB; Leugers, A; Kang, SH; Hsu, SL; Yang, XZ
2001-12-05
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume82Issue:10Pages:2497-2505
AbstractThe anisotropic structures found in drawn poly(lactic acid) films are strongly correlated to their overall dimensional stability. Several aspects of this relationship can be efficiently characterized by Raman spectroscopy. We determined the degree of orientation in these drawn films by measuring the relative intensity of the polarized and depolarized components and the shift in the relative band positions. The bandwidth and specific band frequency also correlated well with the degree of sample crystallinity. These aspects make the Raman method amenable for the online monitoring of orientation and crystallinity in commercial processes. A molecular understanding of heat setting to reduce film shrinkage is also proposed. Raman data from films that were heat-set while physically constrained suggest that amorphous-phase relaxation does not occur during heat setting. Rather, the level of crystallinity increases substantially, indicating that the cause of low shrinkage in the films was due to crystalline network formation rather than amorphous-phase relaxation. (C) 2001 John Wiley & Sons, Inc.
KeywordRaman Spectroscopy Poly(Lactic Acid) Orientation Biaxial Films
Indexed BySCI
Language英语
WOS IDWOS:000171143000018
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/77018
Collection中国科学院化学研究所
Corresponding AuthorSmith, PB
Affiliation1.Dow Chem Co USA, Analyt Sci Lab, Midland, MI 48667 USA
2.Univ Massachusetts, Polymer Sci & Engn Dept, Amherst, MA 01003 USA
3.Univ Massachusetts, Mat Res Sci & Engn Ctr, Amherst, MA 01003 USA
4.Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Polymer Phys Lab, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Smith, PB,Leugers, A,Kang, SH,et al. An analysis of the correlation between structural anisotropy and dimensional stability for drawn poly(lactic acid) films[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2001,82(10):2497-2505.
APA Smith, PB,Leugers, A,Kang, SH,Hsu, SL,&Yang, XZ.(2001).An analysis of the correlation between structural anisotropy and dimensional stability for drawn poly(lactic acid) films.JOURNAL OF APPLIED POLYMER SCIENCE,82(10),2497-2505.
MLA Smith, PB,et al."An analysis of the correlation between structural anisotropy and dimensional stability for drawn poly(lactic acid) films".JOURNAL OF APPLIED POLYMER SCIENCE 82.10(2001):2497-2505.
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