Citation: Song Qing-long, Wen Hui-ying, de Claville Christiansen Jesper, Yu Dong-hong, Chen Chun-sheng, Jiang Shi-chun. Analysis of Structure Transition and Compatibility of PTT/PC Blend without Transesterification[J]. Chinese Journal of Polymer Science, ;2016, 34(9): 1172-1182. doi: 10.1007/s10118-016-1820-6 shu

Analysis of Structure Transition and Compatibility of PTT/PC Blend without Transesterification

a.
College of Engineering and Technology, Northeast Forestry University, Harbin 150040, China
b.
Department of Mechanical and Manufacturing Engineering, Aalborg University, DK-9220, Aalborg, Denmark
c.
Department of Biotechnology, Chemistry, and Environmental Engineering, Aalborg University, DK-9220, Aalborg, Denmark
d.
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

Corresponding author: Wen Hui-ying, hywen@nefu.edu.cn Chen Chun-sheng, scjiang@tju.edu.cn
Received Date: 2 March 2016
Revised Date: 31 March 2016
Accepted Date: 31 March 2016

Fund Project: the Project of Heilongjiang Province Education Department No. 12523013he Fundamental Research Funds for the Central Universities No. DL13CB01the National Natural Science Foundation of China No. 21404022

Poly(trimethylene terephthalate)/polycarbonate (PTT/PC) blends were prepared by solvent mixing to avoid transesterification during high temperature blending. The influences of compositions on the thermal behavior, crystallization morphology and structure of the blends were studied. FTIR results indicated that there was no COO linking to two phenyl groups on each side chain and DSC results supported no transesterification reaction. DSC curves showed that T_c and T_mc increased to maximum range when PC contents were between 7 wt%-15 wt%, however, T_m decreased constantly with the increase of PC contents. It was observed from POM that PTT spherulitic morphology and crystallization kinetics were obviously influenced by the change of PC contents. Structural evolutions during cooling were investigated by SAXS which showed L_c of PTT remained a constant with different PC contents and also fixed during crystallization, nevertheless, it revealed a maximum value of L_nc for sample PTT₉₃. It was concluded that PC chains could be permeated into not only amorphous crystallite structure but also amorphous lamellae structure and 7 wt% PC content was supposed to be the "proper" penetration amount into PTT lamellae structure which led to a maximum capacity of amorphous lamellar layer. Fringed-micelle crystal model was adopted to illustrate semi-crystalline physical structures of the blend in two kinds of component aggregation states.
- Solvent mixing,
- Transesterification,
- Lamellae structure,
- Fringed-micelle
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1.
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