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Synthesis of Starch‐ g ‐Poly(glycidyl methacrylate) and Its Blending with Poly(ϵ‐caprolactone) and Nylon 610
Author(s) -
Kim Gwan Young,
Park Eun Soo,
Kim Kwangsok,
Chin InJoo,
Yoon Jin San
Publication year - 2005
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200550629
Subject(s) - glycidyl methacrylate , ultimate tensile strength , materials science , starch , grafting , caprolactone , polymer chemistry , composite material , polymer , copolymer , chemistry , organic chemistry
Different amounts of glycidyl methacrylate (GMA) were grafted onto corn starch dispersed in water or dimethyl sulfoxide (DMSO) to yield starch‐ graft ‐poly(glycidyl methacrylate) (ST‐ g ‐PGMA). ST‐ g ‐PGMAW, obtained by grafting PGMA onto corn starch that was dispersed in water, showed a higher PGMA grafting content and a lower content of the homopolymerized PGMA than ST‐ g ‐PGMAD, which was prepared in DMSO. The modified starches were blended with poly(ϵ‐caprolactone) (PCL) and nylon 610, respectively, and the tensile properties of the blends were measured by UTM. Mechanical properties of the biodegradable ST‐ g ‐PGMA/PCL blends were dependent on the PGMAD content grafted on starch. Without dramatic loss of the tensile properties of PCL, ST‐ g ‐PGMAW was melt blended with PCL. Meanwhile, an increase in the tensile modulus was observed in the ST‐ g ‐PGMAW/nylon 610 blend. When nylon 610 was reacted with ST‐ g ‐PGMAW in DMSO in the presence of triethylamine, the tensile modulus and strength were much higher than those of the pure nylon 610, and phase‐separated domains of starch were not observed microscopically.