@article{oai:kyutech.repo.nii.ac.jp:00005533,
 author = {Fan,  Yujiang and Nishida, Haruo and 西田, 治男 and Shirai, Yoshihito and 白井, 義人 and Tokiwa,  Yutaka and Endo, Takeshi and 遠藤, 剛},
 issue = {2},
 journal = {Polymer Degradation and Stability},
 month = {Sep},
 note = {Thermal degradation of poly(lactic acid) stereocomplex (scPLA) was investigated to clarify the pyrolysis mechanism. Three scPLA samples with different chain end structures were prepared, namely, as-polymerized scPLA-ap, precipitated-with-methanol scPLA-pr, and purified metal-free scPLA-H. From the analyses of thermal degradation kinetics and pyrolyzates of the scPLA samples, typical degradation mechanisms of these scPLAs were proposed as follows: The pyrolysis of scPLA-ap proceeds through main unzipping depolymerization caused by Sn-alkoxide chain ends with apparent Ea = 80-100kJ mol-1, showing zero-order weight loss behavior. The pyrolysis of scPLA-pr also proceeds via a zero-order weight loss process consisting of main Sn-catalyzed selective lactide elimination with apparent Ea = 100-120kJ mol-1 caused by Sn-carboxylate chain ends. The pyrolyzates from scPLA-ap and scPLA–pr were predominantly L,L-/D,D-lactides. In the case of scPLA-H, random degradation is a main process, producing a large amount of meso-lactide and cyclic oligomers. These degradation mechanisms were nearly the same as those of the corresponding PLLAs, except that the scPLA-ap pyrolysis started at higher temperature due to the higher melting point of scPLA.},
 pages = {197--208},
 title = {Thermal Degradation Behavior of Poly (lactic acid) Stereocomplex},
 volume = {86},
 year = {2004},
 yomi = {ニシダ, ハルオ and シライ, ヨシヒト and エンドウ, タケシ}
}