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Solvent‐induced crystallization of a compatible polymer blend
Author(s) -
Waywood W. J.,
Durning C. J.
Publication year - 1987
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760271702
Subject(s) - crystallization , materials science , acetone , solvent , polymer chemistry , chemical engineering , kinetics , sorption , diffusion , polymer , analytical chemistry (journal) , composite material , chromatography , organic chemistry , chemistry , adsorption , thermodynamics , physics , quantum mechanics , engineering
We studied solvent‐induced crystallization (SINC) in a compatible blend of poly (butylene terephthalate) (PBT) and a polyarylate (PAr) over a range of blend compositions and temperatures; liquid acetone was the crystallizing agent. Acetone transport kinetics were followed by mass uptake measurements in thin films and by optical microscopy. Crystallization kinetics were followed by density measurements. For the 0.2 mm thick films used, those with higher weight fractions of PST (50 to 60 percent by weight) exhibit diffusion controlled transport and crystallization over the entire range of temperatures studied (0 to 55°C). Those with lower weight fractions of PBT (∼30 percent by weight) display Case II sorption and crystal growth controlled crystallization at 0°C. The latter is rare for SINC in homopolymers and results from a sharp reduction in the PBT crystallization rate in the presence of the noncrystallizable PAr.