TY - JOUR
T1 - 聚乳酸-聚己内酯多嵌段立构复合物薄膜的制备及熔融稳定性
AU - Chang, Yue
AU - Chen, Zhize
AU - Yang, Yiqi
N1 - Funding Information:
This work was financially supported by the National Natural Science Foundation Youth Fund of China (51503029).
Funding Information:
请扫描二维码访问本文网络展示页面以获取补充信息(Supplementary Information) 基金项目:国家自然科学基金青年基金(51503029) This work was financially supported by the National Natural Science Foundation Youth Fund of China (51503029).
Publisher Copyright:
© 2019, Materials Review Magazine. All right reserved.
PY - 2019/8/25
Y1 - 2019/8/25
N2 - The environmentally friendly polylactic acid (PLA) film is widely applied in diverse sectors as a substitute of the traditional plastic film. Howe-ver, there are intrinsic flaws in PLA, especially its great possibility to degrade during processing, which make the processing of PLA difficult. For the sake of enhancing the toughness and melt stability of polylactic acid stereocomplex (sc-PLA), the enantiomers of PLA multi-block copolymers with the same molecular weight were synthesized, taking L-lactide, D-lactide and poly(ε-caprolactone) diol (PCL-diOH) as raw materials. Then, the stereocomplex films of the multi-block copolymers (sc-PLCL/PDCD) were prepared by hot-press molding after uniformly mixing the enantiomers. The results of differential scanning calorimeter (DSC) indicated that the sc-PLCL/PDCD exhibited satisfactory melting stability, and the recovery rate of stereo-crystallites after recrystallization exceeded 97%. The test of wide angle X-ray polycrystalline diffraction (WXRD) de-monstrated that only stereo-crystallites existed in the hot pressed film. Besides, the stereocomplex film prepared by this approach was capable of introducing various flexible segments with diol end groups into the PLA chiral molecular chain, so as to rapidly prepare sc-PLA with excellent tensile properties and melting stability, being adapted to melting processing.
AB - The environmentally friendly polylactic acid (PLA) film is widely applied in diverse sectors as a substitute of the traditional plastic film. Howe-ver, there are intrinsic flaws in PLA, especially its great possibility to degrade during processing, which make the processing of PLA difficult. For the sake of enhancing the toughness and melt stability of polylactic acid stereocomplex (sc-PLA), the enantiomers of PLA multi-block copolymers with the same molecular weight were synthesized, taking L-lactide, D-lactide and poly(ε-caprolactone) diol (PCL-diOH) as raw materials. Then, the stereocomplex films of the multi-block copolymers (sc-PLCL/PDCD) were prepared by hot-press molding after uniformly mixing the enantiomers. The results of differential scanning calorimeter (DSC) indicated that the sc-PLCL/PDCD exhibited satisfactory melting stability, and the recovery rate of stereo-crystallites after recrystallization exceeded 97%. The test of wide angle X-ray polycrystalline diffraction (WXRD) de-monstrated that only stereo-crystallites existed in the hot pressed film. Besides, the stereocomplex film prepared by this approach was capable of introducing various flexible segments with diol end groups into the PLA chiral molecular chain, so as to rapidly prepare sc-PLA with excellent tensile properties and melting stability, being adapted to melting processing.
KW - Melt stability
KW - Multi-block copolymer
KW - Polylactic acid stereocomplex
KW - Toughening
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U2 - 10.11896/cldb.19010073
DO - 10.11896/cldb.19010073
M3 - Article
AN - SCOPUS:85073997897
VL - 33
SP - 2808
EP - 2812
JO - Cailiao Daobao/Materials Review
JF - Cailiao Daobao/Materials Review
SN - 1005-023X
IS - 8
ER -