文献类型：期刊文献

英文题名：Predicting the Effect of Dissolved Carbon Dioxide on the Glass Transition Temperature of Poly(acrylic acid)

作者：Cao, Gui-Ping[1];Liu, Tao[2];Roberts, George W.[2]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]N Carolina State Univ, Dept Chem & Biomol Engn, Raleigh, NC 27695 USA

年份：2010

卷号：115

期号：4

起止页码：2136

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20100212634284);WOS:【SCI-EXPANDED(收录号:WOS:000272893400026)】；

基金：Contract grant sponsor: National Natural Science Foundation of China; contract grant numbers: 20490200, 20676031, 20876051.Contract grant sponsor: STC Program of the National Science Foundation, USA; contract grant number: CHE-9876674.

语种：英文

外文关键词：carbon dioxide; poly(acrylic acid); Sanchez-Lacombe; glass transition; binary interaction parameter; Chow's equation

摘要：The morphology and size of poly(acrylic acid) (PAA) particles produced by precipitation polymerization in supercritical CO2 (scCO(2)) depends on the glass transition temperature (T-g) of the polymer at reaction conditions. In this study, the use of the Sanchez-Lacombe equation of state (SL-EOS), in conjunction with Chow's equation, to predict the effect Of CO2 pressure on the T-g of PAA was evaluated. Characteristic parameters for PAA were determined by fitting density data. Characteristic parameters for CO2 were determined by fitting density data in the supercritical region. When the SL-EOS was used in a purely predictive mode, with a binary interaction parameter (psi) of 1, the solubility of CO2 in PAA was underestimated and T-g was overestimated, although the trend of T-g with CO2 pressure was captured. When was determined by fitting the SL-EOS to the measured sorption Of SCCO2 in PAA, the calculated T-g's agreed very well with measured values. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 115: 2136-2143, 2010