中国塑料 ›› 2009, Vol. 23 ›› Issue (08): 48-52 .DOI: 10.19491/j.issn.1001-9278.2009.08.011

• 材料与性能 • 上一篇    下一篇

PLLA-PDLA共聚物薄膜的结晶形态

李海东;林驭寒;聂伟;姬相玲   

  1. 长春工业大学
  • 收稿日期:2009-04-27 修回日期:1900-01-01 出版日期:2009-08-26 发布日期:2009-08-26

Crystalline Morphology of PLLA-PDLA Copolymers Films

LI Hai-dong;LIN Yu-han;NIE Wei;JI Xiang-ling   

  • Received:2009-04-27 Revised:1900-01-01 Online:2009-08-26 Published:2009-08-26

摘要: 利用旋涂法制备一系列的聚左旋-右旋乳酸共聚物(PLLA-PDLA薄膜,对其进行等温结晶处理。利用差示扫描量热仪、原子力显微镜、X-射线衍射仪等手段研究了体系的热性能、结晶形态、晶体结构等性能。结果表明,PLLA-PDLA共聚物在128153 呈现明显结晶峰,利用原子力显微镜得到PLLA-PDLA共聚物样品在不同温度、不同浓度、不同时间、不同溶剂、不同基底条件下的结晶形态,得到不同尺寸的棒状和支化结构晶体,尤其在玻璃基底上形成细的支化结构且互相缠绕,表面的覆盖密度比硅片高的结晶形态。X-射线衍射分析表明在12.01 °20.88 °24.18 °处出现明显的结晶衍射峰。

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Abstract: PLLA-PDLA copolymer film was obtained through spin-coating and crystallized at constant temperature. Thermal property, crystalline morphology, and crystalline structure of the film were studied uisng DSCAFM, and XRD. At 128-153, an obvious crystallization peak was observed. AFM was applied to characterize the crystalline morphology of the film from different crystallization temperature, solution concentration, time, solvent, and substrate. Several rod-shaped and branching crystals with different size were observed. Especially, branching and entangled structures were observed on glass substrate, with a higher coverage density than on the silicon substrate. The XRD gave diffraction peaks at 2q values of 12.01°, 20.88°, and 24.18°.

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