Effects of self-assembled sorbitol-derived compounds on the structures and properties of biodegradable poly (L-lactic acid) prepared by melt blending
學年 107
學期 1
出版（發表）日期 2019-01-01
作品名稱 Effects of self-assembled sorbitol-derived compounds on the structures and properties of biodegradable poly (L-lactic acid) prepared by melt blending
作品名稱（其他語言）
著者 Wei-Chi Lai; Yu-Chen Lee
單位
出版者
著錄名稱、卷期、頁數 Journal of Polymer Research 26(1), 10
摘要 The microstructures and characteristics of biodegradable poly(L-lactic acid) (PLLA) with 1,3:2,4-dibenzylidene-D-sorbitol (DBS) prepared by melt blending were investigated in this study. DBS was added as a diluent to PLLA in the melted state, leading to the disentanglement of PLLA chains and the enhancement of PLLA mobility. Upon cooling from the melt, the formation of self-assembled DBS nanofibrils enhanced the hardness and stiffness of PLLA. DBS nanofibrils were measured with diameters of 40–50 nm, as observed using scanning electron microscopy (SEM). In addition, the thermal and crystallization behaviors of PLLA were significantly influenced by the addition of DBS. The ordered and regular α-crystals of PLLA were favored when DBS was added. The crystallization rates of PLLA are tunable by varying the isothermal crystallization temperatures of PLLA and the amounts of DBS. The presence of DBS interfered with the crystallization rates of PLLA. However, at higher crystallization temperatures of PLLA, DBS facilitated the formation of nuclei, leading to an increase in the crystallization rates of PLLA. Furthermore, the hydrophilicity of PLLA was significantly improved by a further increase in DBS concentration.
關鍵字 PLLA;Self-assembled;Nanofibrils;Hydrophilicity
語言 en
ISSN 1022-9760
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者
審稿制度 否
國別 NLD
公開徵稿
出版型式 ,電子版
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