Preparation and properties of functionalized polyorganosiloxanes
Preparation and properties of functionalized polyorganosiloxanes
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DOI：
10.1002/app.1910
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发表时间：
2001-10
影响因子：
3
通讯作者：
G. Yahaya;B. J. Brisdon;M. Maxwell;R. England
中科院分区：
文献类型：
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作者：
G. Yahaya;B. J. Brisdon;M. Maxwell;R. England
合成并表征了一系列直链官能化聚有机硅氧烷Me_3SiO [MeSiO（CH_2）_nR]_x（Me_2SiO）_ySiMe_3，其中n = 2，R =-（CH_2）NMe_2; n = 1，R =-（CH_2）OEt; n = 4，R = -（CH_2）COOEt; n = 3，R = -（CH_2）Me。通过使用二氯（1，5-环辛二烯）铂（II）作为催化剂，使具有适当的x：y比率的市售共聚物Me 3SiO（MeSi{H} O）x（Me 2SiO）ySiMe 3与所需量的HO（CH 2）nR反应，获得0.4mol%（x = 1，y = 25）、0.11mol%（x = 3，y = 23）和0.30mol%（x = 8，y = 18）的官能团负载。胺，醚，酯，和烷基官能化的硅氧烷，得到了良好的收率纯化后，和每种流体聚合物的特征在于1H和13 C-核磁共振（NMR），傅里叶变换红外（FTIR）光谱测量，元素分析，粘度，表面张力，和密度测量。官能化聚合物在0.4-79.4 s-1的剪切速率范围内表现出牛顿行为，并且与类似链长的聚（二甲基硅氧烷）流体相比，观察到所有官能化聚合物的显著粘度增强。在几乎所有情况下，官能化的硅氧烷表现出粘度和密度随着官能团负载量的增加而增加。还测定了聚合物的表面张力，其范围为18.8-22.3 mN m-1。John Wiley & Sons，Inc.应用聚合物科学杂志82：808-817，2001
A series of linear functionalized polyorganosiloxanes of the type Me3SiO[MeSiO(CH2)nR]x(Me2SiO)ySiMe3, where n = 2, R = —(CH2)NMe2; n = 1, R = —(CH2)OEt; n = 4, R = —(CH2)COOEt; n = 3, R = —(CH2)Me, have been prepared and characterized. Functional group loadings of ∼4 mol % (x = 1, y = 25), ∼11 mol % (x = 3, y = 23), and ∼30 mol % (x = 8, y = 18) were obtained by reacting commercially available copolymers Me3SiO(MeSi{H} O)x(Me2SiO)ySiMe3 with the appropriate ratios ofx:y, with the required quantities of HO(CH2)nR, using dichloro(1,5-cyclooctadiene)platinum(II) as catalyst. Amine, ether, ester, and alkyl functionalized siloxanes were obtained in good yields after purification, and each fluid polymer has been characterized by 1H and 13C-nuclear magnetic resonance (NMR), and Fourier transform infrared (FTIR) spectral measurements, elemental analysis, viscosity, surface tension, and density measurements. The functionalized polymers exhibit Newtonian behavior over the range of shear rates 0.4–79.4 s−1, and significant viscosity enhancements were observed for all functionalized polymers compared with poly(dimethylsiloxane) fluids of similar chain lengths. The functionalized siloxanes exhibited in almost all cases an increase in both viscosity and density as the functional group loading increased. The surface tensions of the polymers have also been determined and lie within the range 18.8–22.3 mN m−1. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 808–817, 2001