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Studies on the Synthesis of Inorganic Polymers for 21" Century and New Materials from the Precursors.

21世纪无机聚合物及其前驱体新材料的合成研究。

基本信息

批准号：
10490027
负责人：
YOSHIMOTO Abe
金额：
$ 6.91万
依托单位：
SCIENCE UNIVERSITY OF TOKYO
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2001
项目状态：
已结题

项目摘要

1)Synthesis of isocyanatooligosiloxanes and ladder oligosiloxanes with 1-3 ring system by hydrolytic polycondensation of methyltriisocyanatosilane was investigated. :It was found that the reaction provided linear and cyclic oligosiloxanes from dimer to octamer or from tetramer to hexamer, respectively, and also a bicyclopentasiloxane with propeller like structure. Furthermore, an interesting result was revealed on the relationship between the structure and the spectral data of V_<s1-os1> and chemical shift in IR and <29>^NMR spectra. On the other hand, the condensation reaction of disiloxanes with cyclic tetrasiloxanes with the different sila-functional groups gave ladder oligosiloxanes consisted of two and three ring system. The detailed investigation on the structure is undertakene.2) Polysiloxazanes as a precursor for silicon oxynitride Si_2N_2O were synthesized by the reaction of tetraisocyanatodisiloxane with ammonia. It was observed that the stability of polysiloxyazanes to self-condensation is dependent on the reaction conditions, and also low molecular weight polysiloxazanes in the certain concentration of THF undergo further condensation to form high molecular weight polymers. Thus by heat-treatment, the precursors were transformed to SiNCO or SiNO depending on the atmosphere. 3) Polyaddition of viny1-and 3-methacryloxypropyltrimethoxysilane followed by hydrolytic polycondensation was found to provide polymer hybrids constructed of both carbon and siloxane chain and to form free-standing films on casting them. In addition, the mechanical properties of films were confirmed to be correlated to the structure. 4)TEOS-PEG-Li hybrid high ion conductor and electrochromic oxide thin films of W or Ir were prepared by sol-gel process and the relationship between the structure and the properties were investigated.

1)研究了甲基三异氰酸酯基硅烷水解缩聚合成异氰酸酯低聚硅氧烷和1-3环体系的梯形低聚硅氧烷。：发现该反应分别提供了从二聚体到八聚体或从四聚体到六聚体的线性和环状低聚硅氧烷，以及具有螺旋桨状结构的双环五硅氧烷。此外，关于V_<s1-os1>的结构和光谱数据以及IR和29^NMR光谱中的化学位移之间的关系揭示了一个有趣的结果。另一方面，二硅氧烷与具有不同硅官能团的环状四硅氧烷的缩合反应得到由二环和三环体系组成的梯形低聚硅氧烷。对其结构进行了详细研究。2)以四异氰酸二硅氧烷与氨反应合成了氮氧化硅Si_2N_2O前驱体聚硅氧氮烷。据观察，聚硅氧氮烷自缩合的稳定性取决于反应条件，并且低分子量聚硅氧氮烷在一定浓度的THF中进一步缩合形成高分子量聚合物。因此，通过热处理，根据气氛，前体转化为 SiNCO 或 SiNO。 3)发现乙烯基1-和3-甲基丙烯酰氧基丙基三甲氧基硅烷加聚，然后进行水解缩聚，可提供由碳链和硅氧烷链构成的聚合物杂化物，并在浇铸时形成自支撑薄膜。此外，薄膜的机械性能被证实与结构相关。 4)采用溶胶-凝胶法制备了TEOS-PEG-Li杂化高离子导体和W、Ir电致变色氧化物薄膜，并研究了其结构与性能的关系。