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An efficient, food contact accelerator for stereocomplexation of high-molecular-weight poly(L-lactide)/ poly(D-lactide) blend under nonisothermal crystallization
Chen, Y; Hua, WQ; Zhang, ZC; Xu, JZ; Bian, FG; Zhong, GJ; Xu, L; Li, ZM
2019
Source PublicationPOLYMER
ISSN0032-3861
Volume170Issue:-Pages:54—64
Subtype期刊论文
AbstractIt is an effective strategy to improve the heat resistance of polylactide (PLA) via forming stereocomplex crystals (SCs) in poly(L-lactide) (PLLA)/poly(D-lactide) (PDLA) blend. In this work, pentearythritol (PENTA), which is an environment-friendly polyhydroxy compound for food packaging, is selected to facilitate the SC crystallization and suppress the HC crystallization for HMW PLLA/PDLA blend. Impressively, only 3 wt% PENTA is added, the exclusive SCs with high content (X-c,X-SC = 50%) can be obtained, which exhibits a high promotion efficiency of crystallization of SCs. Interestingly, with PENTA content ascending, the crystallinity of SCs increases drastically first and then in a relatively slow manner. Furthermore, Miscibility with high content of PENTA leads to a relatively looser packing of SC lamella in the blend confirmed by scanning electron microscope (SEM) due to intercalation of PENTA between crystal lamella. The mechanism of how PENTA facilitates the formation of SCs at molecular level is also proposed in this work.
KeywordENANTIOMERIC POLY(LACTIC ACID)S PHASE MORPHOLOGY HYDROGEN-BOND POLYLACTIDE MELT CRYSTALS PERSPECTIVE BEHAVIOR HEAT
DOI10.1016/j.polymer.2019.03.003
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/31467
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Sichuan Univ, State Key Lab Polymer Mat Engn, Coll Polymer Sci & Engn, Chengdu 610065, Sichuan, Peoples R China;
2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
Recommended Citation
GB/T 7714
Chen, Y,Hua, WQ,Zhang, ZC,et al. An efficient, food contact accelerator for stereocomplexation of high-molecular-weight poly(L-lactide)/ poly(D-lactide) blend under nonisothermal crystallization[J]. POLYMER,2019,170(-):54—64.
APA Chen, Y.,Hua, WQ.,Zhang, ZC.,Xu, JZ.,Bian, FG.,...&Li, ZM.(2019).An efficient, food contact accelerator for stereocomplexation of high-molecular-weight poly(L-lactide)/ poly(D-lactide) blend under nonisothermal crystallization.POLYMER,170(-),54—64.
MLA Chen, Y,et al."An efficient, food contact accelerator for stereocomplexation of high-molecular-weight poly(L-lactide)/ poly(D-lactide) blend under nonisothermal crystallization".POLYMER 170.-(2019):54—64.
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