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首页> 外文期刊>Journal of Applied Polymer Science >Characterization of the network structure of hydroxyl terminated poly(butadiene) elastomers prepared by different reactive systems
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Characterization of the network structure of hydroxyl terminated poly(butadiene) elastomers prepared by different reactive systems

机译：不同反应体系制备的羟基封端的聚丁二烯弹性体网络结构的表征

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Three types of hydroxyl terminated poly(butadiene) (HTPB) networks having different NCO/OH reactive group ratios were prepared using three different reactive systems (i.e., Desmodur N-100 pluriisocyanate, isophorone diisocyanate (IPDI)/trimethylol propane (TMP), and hexamethylene diisocyanate (HMDI)/TMP). Desmodur N-100 and TMP were used as polyfunctional reactants. The polymer-solvent interaction parameters (chi(1)) for HTPB-tetrahydrofuran (THF) and HTPB-chloroform systems at 45 degrees C were determined, using a vapor pressure osmometer (VPO), as 0.31 and 0.24, respectively. Equilibrium swelling values of the networks in THF and chloroform and the data obtained by osmometry were further used for the calculation of the mean number-average molecular weight between junction points ((M) over bar(c)) of HTPB networks through the Flory-Rehner equation. The (M) over bar(c) values of each network, which were calculated from the swelling data obtained in THF and chloroform using the corresponding chi(1) parameters for polymer-solvent systems, were found to be nearly the same. The changes in the mechanical, swelling, and the solubility properties of the networks prepared by three different reactive systems were followed. (C) 1998 John Wiley & Sons, Inc. [References: 26]
机译：使用三种不同的反应体系（即Desmodur N-100多异氰酸酯，异佛尔酮二异氰酸酯（IPDI）/三羟甲基丙烷（TMP）和六亚甲基二异氰酸酯（HMDI）/ TMP）。 Desmodur N-100和TMP用作多官能反应物。使用蒸气压渗透计（VPO）确定HTPB-四氢呋喃（THF）和HTPB-氯仿体系在45摄氏度下的聚合物-溶剂相互作用参数（chi（1））分别为0.31和0.24。 THF和氯仿中网络的平衡溶胀值以及通过渗透压法获得的数据还用于通过Flory-计算HTPB网络结点之间的平均数均分子量（（M）超过bar（c））。雷纳方程。发现每个网络的（M）over bar（c）值几乎是相同的，这些值是从THF和氯仿中使用相应的chi（1）参数在THF和氯仿中获得的溶胀数据计算得出的。遵循由三种不同的反应体系制得的网络的机械，溶胀和溶解度特性的变化。 （C）1998 John Wiley＆Sons，Inc. [参考：26]

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