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Composition optimization of poly(vinyl alcohol)‐/cornstarch‐blended biodegradable composite using response surface methodology
Author(s) -
Chen YingDa,
Peng Jinchyau,
Lui WaiBun
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.29557
Subject(s) - vinyl alcohol , glycerol , composite number , response surface methodology , absorption of water , materials science , central composite design , copolymer , starch , alcohol , amylase , aqueous solution , solubility , composite material , chemical engineering , polymer chemistry , chemistry , polymer , food science , organic chemistry , chromatography , engineering , enzyme
Response surface methodology was used to analyze the effect of amylase level ( X 1 ) and glycerol level ( X 2 ) on the objective [water solubility index (WSI), water absorption index (WAI), and Max. loading] attributes of a poly(vinyl alcohol)‐/cornstarch‐blended composite. A rotable central‐composite design (CCD) was used to develop models for the objective responses. The experiments were run at die temperature 100°C with a feed rate of 25 g/min and a screw speed of 35 rpm. Responses were most affected by changes in the amylase level ( X 1 ) and to a lesser extent by glycerol level ( X 2 ). Individual contour plots of the different responses were overlaid, and regions meeting the optimum WSI of 3.03 (%), WAI of 5.08 (g gel/g dry wt), and Max. loading of 29.36 (N) were identified at the amylase level of 2.8 (mL) and the glycerol level of 92.2 (mL), respectively. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009
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