3-(2,3-Dihydroxypropoxy)propyl-terminated polydimethylsiloxanes (DHT-PDMS) samples were prepared through the copolymerization of 1,1,3,3,5,5,7,7-octamethylcyclotetrasiloxane (D₄) and 1,3-bis[3-(2,3-dihydroxypropoxy)propyl]-1,1,3,3-tetramethyldisiloxane by acid-catalyzed equilibration. Their structures were characterized with IR and ¹H-NMR spectra. The molecular weights were determined with gel permeation chromatography and ¹H-NMR spectra, respectively. Differential scanning calorimetry and thermogravimetric analysis were used to investigate the thermodynamic properties and thermal degradation of DHT-PDMS. The effects of various factors on the synthesis of DHT-PDMS were also examined. However, the preparation of DHT-PDMS through the base-catalyzed equilibrium copolymerization of D₄ and 1,3-bis[3-(2,3-epoxypropoxy)propyl]-1,1,3,3-tetramethyldisiloxane, followed by the hydrolysis of the epoxy groups, was unsuccessful. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 110–115, 2004

中文翻译：

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3-（2,3-二羟基丙氧基）丙基封端的聚二甲基硅氧烷的合成与表征

通过1,1,3,3,3,5,5,7,7-八甲基环_四硅氧烷（D ₄）和1,3的共聚制备3-（2,3-二羟基丙氧基）丙基封端的聚二甲基硅氧烷（DHT-PDMS）样品。-双[3-（2,3-二羟基丙氧基）丙基] -1,1,3,3-四甲基二硅氧烷的酸催化平衡。它们的结构用IR和¹ H-NMR谱表征。分子量用凝胶渗透色谱法和¹1 H-NMR谱。用差示扫描量热法和热重分析法研究了DHT-PDMS的热力学性质和热降解。还检查了各种因素对DHT-PDMS合成的影响。但是，通过D ₄和1,3-双[3-（2,3-环氧丙氧基）丙基] -1,1,3,3-四甲基二硅氧烷的碱催化平衡共聚反应制备DHT-PDMS。环氧基的水解不成功。©2004 Wiley Periodicals，Inc. J Appl Polym Sci 94：110–115，2004