Premium
Miscible blends containing a crystallizable component: poly(vinyl alcohol)/poly(ethyleneimine)
Author(s) -
Guo Qipeng
Publication year - 1995
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1995.030161102
Subject(s) - crystallinity , materials science , crystallization , vinyl alcohol , glass transition , polymer chemistry , polymer blend , chemical engineering , polymer , amorphous solid , ethyleneimine , solvent , composite material , copolymer , organic chemistry , chemistry , engineering
Blends of poly(vinyl alcohol) (PVAI) with poly(ethyleneimine) (PEI) were prepared by casting from a common solvent. All blends show a single, composition dependent glass transition temperature ( T g ), indicating that the blends are miscible in the amorphous state and in the melt. The overall crystallization rate of PVAI in the blend decreases with increasing PEI content. The crystallinity index of PVAI in the blend does not decrease greatly with PEI content up to a composition of 70/30 PVAI/PEI, since the T g of the crystallizable component PVAI is larger than that of the non‐crystallizable component PEI. The T g of the system PVAI/PEI decreases with increasing PEI content. The interaction parameter B of the two polymers in the melt was found to be −24 J/cm 3 .