Benabdelghani Z, Etxeberria A, Djadoun S, Iruin J J, Uriarte C
Faculty of Chemistry, University of Sciences and Technology Houari Boumediane, BP 32, El Alia, Algiers 16111, Algeria.
J Chromatogr A. 2006 Sep 15;1127(1-2):237-45. doi: 10.1016/j.chroma.2006.05.093. Epub 2006 Jul 7.
The miscibility behaviour of blends of poly(styrene-co-methacrylic acide) (PSMA-12) containing 12% of methacrylic acid with poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) at five different compositions has been studied by inverse gas chromatography (IGC). The adequacy of two types of solvents (solvents and precipitants) has been tested in order to detect the glass transition temperature, T(g). A single T(g) has been observed in PSMA-12/PPO blends containing less than 67wt% of PPO. Two glass transition temperatures appeared, however, in blends containing higher PPO content. The polymer-polymer interaction parameters have been calculated in the molten state (260-280 degrees C), their values being in good agreement with the observed phase behaviour. Moreover, the methods proposed by Farooque-Deshpande and Huang for obtaining the true polymer-polymer interaction parameters have been compared. Finally, the ability of IGC in order to determine T(g)s has been extended to a ternary system, PSMA-12/PPO/EMV4P-8 poly(ethylmethacrylate-co-4-vinylpyridine) which, depending on the composition, gives a single, two and even three T(g)s.
通过反相气相色谱法（IGC）研究了含12%甲基丙烯酸的聚（苯乙烯 - 共 - 甲基丙烯酸）（PSMA - 12）与聚（2,6 - 二甲基 - 1,4 - 亚苯基氧化物）（PPO）在五种不同组成下的共混物的混溶行为。为了检测玻璃化转变温度T(g)，测试了两种类型的溶剂（溶剂和沉淀剂）的适用性。在含PPO小于67wt%的PSMA - 12/PPO共混物中观察到单一的T(g)。然而，在含较高PPO含量的共混物中出现了两个玻璃化转变温度。在熔融状态（260 - 280摄氏度）下计算了聚合物 - 聚合物相互作用参数，其值与观察到的相行为良好吻合。此外，比较了Farooque - Deshpande和Huang提出的用于获得真实聚合物 - 聚合物相互作用参数的方法。最后，将IGC测定T(g)的能力扩展到三元体系PSMA - 12/PPO/EMV4P - 8聚（甲基丙烯酸乙酯 - 共 - 4 - 乙烯基吡啶），根据组成不同，该体系会给出单一、两个甚至三个T(g)。
Zotero 插件