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Tytuł pozycji:

Characteristic Chain-End Racemization Behavior during Photolysis of Poly(L-lactic acid)

Tytuł :
Characteristic Chain-End Racemization Behavior during Photolysis of Poly(L-lactic acid)
Index Terms :
poly(L-lactic acid)
photolysis
racemization
stereosequence
stereoregularity
Journal Article
Journal Article
Wydawca :
American Chemical Society 2018-05-07
Dodane szczegóły :
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
Eco-Town Collaborative R&D Center for the Environment and Recycling, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
Graduate School of Life Science and Systems Engineering and Eco-Town Collaborative R&D Center for the Environment and Recycling, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
Eco-Town Collaborative R&D Center for the Environment and Recycling, 2-4 Hibikino, Wakamatsu-ku, Kitakyushu 808-0196, Japan
Yasuda, Nobuhiko
Tsukegi, Takayuki
Shirai, Yoshihito
Nishida, Haruo
Typ dokumentu :
Zasób elektroniczny
URL :
http://jairo.nii.ac.jp/0054/00006011">http://jairo.nii.ac.jp/0054/00006011
info:doi/http://dx.doi.org/10.1021/bm200775r
Dostępność :
Open access content. Open access content
American Chemical Society
This material is excerpted from a work that was published in Biomacromolecules, copyright © American Chemical Society after peer review.
Pozostałe numery :
JPNII oai:irdb.nii.ac.jp:0054/00006011
https://kyutech.repo.nii.ac.jp/?action=repository_action_common_download&item_id=5526&item_no=1&attribute_id=17&file_no=1
1525-7797
1526-4602
Biomacromolecules
12
9
3299
3304
2011-07-27
1060404118
Źródło wspomagające :
NATIONAL INST OF INFO
From OAIster®, provided by the OCLC Cooperative.
Numer akcesji :
edsoai.on1060404118
Zasób elektroniczny
Photolysis of poly(L-lactic acid) (PLLA) has many unclear points, such as the degradation mechanism, kinetics, products, and racemization mechanism. To clarify these features of PLLA photolysis, we examined the relationship between photolysis and racemization. The hexad stereosequential analysis of photodegraded PLLA was investigated to specify the racemized positions within a chain in comparison with hydrolysis and thermal degradation. Results from 13C NMR spectra of UV-irradiated PLLA samples indicated that the samples have racemized D-lactate units at chain ends. From the comparison of racemization behavior among photolysis, hydrolysis, and thermal degradation, it was confirmed that the preferential racemization behavior of each of these three degradation processes is characteristic and distinct, being identified as chain-end racemization, poor racemization, or internal-unit racemization, respectively. The characteristic chain-end racemization behavior of photolysis was first confirmed in this study.

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