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Crystallization behaviour of cellulose acetate butylate/poly(butylene succinate)‐ co ‐(butylene carbonate) blends
Author(s) -
Lee SeungHwan,
Wang Siqun
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1951
Subject(s) - differential scanning calorimetry , crystallization , materials science , polymer blend , polymer , polymer chemistry , diluent , chemical engineering , kinetics , isothermal process , lamellar structure , avrami equation , amorphous solid , activation energy , nuclear chemistry , copolymer , chemistry , crystallization of polymers , crystallography , composite material , thermodynamics , physics , quantum mechanics , engineering
The kinetics of the isothermal crystallization process from the melt of pure poly(butylene succinate)‐ co ‐(butylene carbonate) (PBS‐ co ‐BC) and its blends with cellulose acetate butylate (CAB) (10–30 wt%) was studied by differential scanning calorimetry (DSC) and the well‐known Avrami equation. In the blends, the overall crystallization rate of PBS‐ co ‐BC became slower with increasing CAB content. The equilibrium melting temperature ( $T_{\rm {m}}^{\rm {eq}}$ ) of PBS‐ co ‐BC decreased with increasing CAB content, which was similar to that with other miscible crystalline/amorphous polymer blends. The slower crystallization kinetics of PBS‐ co ‐BC in the blends was explicable in terms of a diluent effect of the CAB component. By application of Turnbull–Fisher kinetic theory for polymer–diluent blend systems, the surface free energy (σ e ) of pure PBS‐ co ‐BC and of the blends was obtained, indicating that the blend with CAB resulted in a decrease in the surface free energy of folding of PBS‐ co ‐BC lamellar crystals. Copyright © 2006 Society of Chemical Industry