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Property enhancement of poly(butylene succinate)/poly(ethyleneglycol‐ co ‐cyclohexane‐1,4‐dimethanolterephthalate) blends via high‐speed extrusion and in situ fibrillation
Author(s) -
Fan Mao,
Zhou Mi,
Deng Sha,
Chen Feng,
Zhang Qin,
Fu Qiang
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47549
Subject(s) - materials science , extrusion , polybutylene succinate , cyclohexane , composite material , phase (matter) , reactive extrusion , polymer , chemical engineering , polymer chemistry , organic chemistry , chemistry , engineering
In the current work, poly(butylene succinate)(PBS)/poly(ethylene glycol‐ co ‐cyclohexane‐1,4‐dimethanolterephthalate) (PETG) blends were first prepared by high‐speed extrusion melt processing, and the dependence of the dispersed morphology(phase size) was investigated as function of screw speed. Then, the prepared blends were subjected to a “melt extrusion‐uniaxial cold stretching” process to convert the dispersed phase into fibrillar structure, and the diameter change and property enhancement of PBS/PETG blends were further studied. It was found, at fixed ratio of PBS/PETG = 80/20 (wt/wt), the diameters of the PETG was changed from 2.25, 1.29, 1.11, 0.89 μm to 1.13, 0.64, 0.50, 0.38 μm, as increasing the screw speed from 150, 500, 700 rpm to 900 rpm, respectively. In addition, increasing the extrusion speed is favorable not only for smaller but more uniform dispersed phase particles, thus leading to finer microfibrils with narrower diameter distribution after cold stretching. As a result, the yield strength of PBS could be improved from 25.6 to 39.8 MPa for blend obtained via high‐speed extrusion and stretching. Our work is important for the preparation of polymer blends with improved property. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47549.