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Mechanical properties and crystallization behavior of poly(lactic acid) blended with dendritic hyperbranched polymer
Author(s) -
Zhang JianFeng,
Sun Xiuzhi
Publication year - 2004
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.1457
Subject(s) - crystallinity , ultimate tensile strength , materials science , crystallization , starch , nucleation , lactic acid , elongation , polymer , chemical engineering , biodegradable polymer , polymer chemistry , composite material , chemistry , organic chemistry , biology , bacteria , engineering , genetics
Mechanical properties of poly(lactic acid) (PLA) blended with a small amount of dendritic hyperbranched polymer (DHP) were investigated. Effects of DHP and starch on mechanical properties of PLA were compared. DHP significantly improved tensile strength and elongation at break of PLA. A small amount of starch in PLA slightly improved PLA's elongation, but had no effect on tensile strength. Isothermal crystallization kinetics of PLA blended with DHP and starch were also studied. Both DHP and starch acted as nucleation agents and significantly increased crystallization rate and crystallinity of PLA. Copyright © 2004 Society of Chemical Industry