Thermal Behavior and Crystal Structure of Poly(l-lactic acid) with 1,3:2,4-Dibenzylidene-d-sorbitol

doi:10.1021/jp2037312

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/73555

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/73555

题名:	Thermal Behavior and Crystal Structure of Poly(l-lactic acid) with 1,3:2,4-Dibenzylidene-d-sorbitol
作者:	Lai, Wei-Chi
贡献者:	淡江大學化學工程與材料工程學系
日期:	2011
上传时间:	2011-11-15 15:22:07 (UTC+8)
出版者:	Washington: American Chemical Society
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.
關聯:	The Journal of Physical Chemistry B 115(38), pp.11029–11037
DOI:	10.1021/jp2037312
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	255	检视/开启
index.html		0Kb	HTML	255	检视/开启

在機構典藏中所有的数据项都受到原著作权保护.

TAIR相关文章

数据加载中.....