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Effects of glycerol and ethylene–acrylic acid on composition optimization of PVOH/starch‐blended biodegradable resin using response surface methodology
Author(s) -
Li YangXiu,
Peng Jinchyau,
Lui WaiBun,
Lin Jenshinn
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30851
Subject(s) - glycerol , ultimate tensile strength , starch , absorption of water , acrylic acid , materials science , response surface methodology , solubility , composite material , aqueous solution , composite number , ethylene , composition (language) , copolymer , chemical engineering , nuclear chemistry , chemistry , polymer , organic chemistry , chromatography , catalysis , engineering , linguistics , philosophy
Response surface methodology was used to analyze the effect of glycerol ( X 1 ) and ethylene–acrylic acid (EAA) level ( X 2 ) on the objective (water solubility index (WSI), water absorption index (WAI), and tensile strength) attributes of a poly(vinyl alcohol) (PVOH)/starch‐blended plastic resin. A rotable central composite design was used to develop models for the objective responses. The experiments were run with different barrel temperatures, such as zone 1: 100°C, zone 2: 100°C, zone 3: 105°C, and zone 4: 105°C, respectively, with a feed rate of 20 g/min and screw speed of 25 rpm. Responses were most affected by changes in glycerol level ( X 1 ) and to a lesser extent by EAA level ( X 2 ). Individual contour plots of the different responses were overlaid, and regions meeting the optimum WSI of 6.10%, WAI of 5.57 g gel/g dry wt, and tensile strength of 62.14 MPa were identified at the glycerol level of 72.41 mL and the EAA level of 36.03 g, respectively. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009