期刊論文

標題 Thermal Behavior and Crystal Structure of Poly(l-lactic acid) with 1,3:2,4-Dibenzylidene-d-sorbitol
學年 99
學期 1
出版(發表)日期 2011/01/01
作品名稱 Thermal Behavior and Crystal Structure of Poly(l-lactic acid) with 1,3:2,4-Dibenzylidene-d-sorbitol
作品名稱(其他語言)
著者 Lai, Wei-Chi
單位 淡江大學化學工程與材料工程學系
出版者 Washington: American Chemical Society
著錄名稱、卷期、頁數 The Journal of Physical Chemistry B 115(38), pp.11029–11037
摘要 This study investigated the effect of 1,3:2,4-dibenzylidene-d-sorbitol (DBS) on the thermal behavior and crystal structure of poly(l-lactic acid) (PLLA) by differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD). Different PLLA crystal structures (α- or α′-form crystal) were found by the change of the DBS amount and PLLA crystallization temperature. The order and regular α-form of PLLA was favored as the DBS component was added. The α-form crystal formed more at lower temperatures. Therefore, the disorder-to-order (α′-to-α) phase-transition temperature of PLLA was found to shift at lower temperatures as more DBS content was added. In the proposed structure of PLLA with DBS, the DBS molecules are stacked together through π–π interaction to form a strand with the PLLA molecules by hydrogen bonding. Because of these interactions, PLLA could have a more regular structure with the addition of DBS. In addition, the equilibrium melting point and glass-transition temperature of PLLA were not significantly changed with the addition of DBS. However, the addition of DBS changed the crystal structure of PLLA and thus affected the crystallization rate of PLLA.
關鍵字
語言 英文
ISSN 1520-6106; 1520-5207
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 Lai, Wei-Chi
審稿制度
國別 美國
公開徵稿
出版型式 紙本