The Morphology and Mechanical Properties of Poly(Lactic Acid) Stereocomplex Crystal
[1]Liu Yanping Wei Hanghang,Li Qian.The Morphology and Mechanical Properties of Poly(Lactic Acid) Stereocomplex Crystal[J].Journal of Zhengzhou University (Engineering Science),2018,39(06):83-87.[doi:10.13705/j.issn.1671-6833.2017.06.017]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
39
Number of periods:
2018 06
Page number:
83-87
Column:
Public date:
2018-10-24
- Title:
- The Morphology and Mechanical Properties of Poly(Lactic Acid) Stereocomplex Crystal
- Keywords:
- Polylactic acid; Vertical structure composite crystals; The surface morphology; Mechanical properties of
- CLC:
- -
- Abstract:
- The surface morphology and the different mechanical properties between crystalline region and amorphous region of the stereocomplex crystal were studied in this paper. The same mass ratio of Poly (L-lactic acid) (PLLA) and poly (D-lactic acid) (PDLA) stereocomplex was prepared by solution blending. Differential Scanning Calorimetry, Polarizing Microscope, Atomic Force Microscopy, Confocal Laser Scanning Microscope and Nano Indentation Tester were used to list the surface morpholigy of PLA stereocomplex crystal and the diversification of mechanical properties. The result showed that a high degree of stereo-tacticity of PLLA/PDLA blend could be achieved from the mass ratio of 1/1 for sample.The research also showed that obviously depression phenomenon on the surface of crystal was formed due to the contraction of the molecular chain. Furthermore, the hardness and modulus of crystalline region were improved compared to the amorphous region.
- References:
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Last Update:
2018-10-27