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近年来,各国化学家对含金属高分子化合物的研究非常重视,目的在于制取耐热性的聚合物。已经合成的有:聚有机钛硅氧烷、聚有机铝硅氧烷如聚苯基钛硅氧烷、聚苯基铝硅氧烷等。Si∶Al=4∶1的聚苯基铝硅氧烷是一种白色透明的硬脆聚合物。热稳定性好,能溶于有机溶剂,可以用来制造硬质透明的胶片。它的平均分子量为6,000。以M-O键为主键的聚铝氧烷和聚钛氧烷也受人注意。聚有机硅铝氧烷是由硅烷醇与金属铝,或者是将硅烷醇的钠盐与氯化铝所得的铝硅酸盐水解而制得。
In recent years, chemists from all over the world have paid great attention to the study of metal-containing macromolecular compounds for the purpose of preparing heat-resistant polymers. There have been synthesized: polyorganosiloxanilanes, polyorganoaluminosiloxanes such as polyphenyltitanium siloxane, polyphenylsilylsiloxane and the like. Polyphenylaluminoxane with Si: Al = 4: 1 is a white, transparent, hard and brittle polymer. Thermal stability, soluble in organic solvents, can be used to make hard and transparent film. Its average molecular weight is 6,000. Polyaluminoxanes and poly-titanoxanes, which are mainly composed of M-O bonds, are also attracting attention. Polyorganosiloxanates are prepared by the hydrolysis of silanols with metallic aluminum, or with aluminosilicates obtained from the sodium salt of silanol and aluminum chloride.