Preparation and characterization of stable DQ silicone polymer sols
Preparation and characterization of stable DQ silicone polymer sols
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DOI：
10.1007/s10971-018-4839-z
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发表时间：
2018-10
影响因子：
2.5
通讯作者：
Ryohei Hayami;Izumi Nishikawa;Takayuki Hisa;Hiroaki Nakashima;Yohei K. Sato;Yuzuko Ideno;T. Sagawa;Satoru Tsukada;Kazuki Yamamoto;T. Gunji
中科院分区：
文献类型：
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作者：
Ryohei Hayami;Izumi Nishikawa;Takayuki Hisa;Hiroaki Nakashima;Yohei K. Sato;Yuzuko Ideno;T. Sagawa;Satoru Tsukada;Kazuki Yamamoto;T. Gunji
摘要采用以下方法制备了由二(D)-和四(Q)功能化烷氧基硅烷组成的稳定的DQ有机硅聚合物溶胶：(1)二氧基（二甲基）硅烷（DEDMS）和四乙氧基硅烷（TEOS）共水解-缩聚（DEDMS - TEOS为无规共聚物溶胶），(2)聚二甲基硅氧烷（PDMS）和TEOS （PDMS - TEOS为无规嵌段共聚物溶胶）共水解-缩聚，(3)PDMS-锂盐三乙氧基硅基化（PDMS - tes）。用GPC、NMR和FT-IR对聚合物溶胶进行了表征。从热稳定性和膨胀试验两方面分析了不同结构的性能差异。这些聚合物溶胶的热稳定性随D结构域链长的增加而增加，随水解能力的降低而降低。随着溶胶中交联度的增加，聚合物溶胶中膜的膨胀减小。采用三种不同的方法制备了DQ有机硅聚合物溶胶，并用NMR、FT-IR和GPC对其进行了表征。这些溶胶的热稳定性随着D单元链长和抗水解能力的增加而增加。溶剂吸收量随交联度的降低而增加
AbstractStable DQ silicone polymer sols composed of di (D)- and tetra (Q)-functional alkoxysilanes were prepared by the following methods: (i) co-hydrolysis–condensation between diethoxy(dimethyl)silane (DEDMS) and tetraethoxysilane (TEOS) (DEDMS–TEOS as random copolymer sols), (ii) co-hydrolysis–condensation between poly(dimethylsiloxane) (PDMS) and TEOS (PDMS–TEOS as random block copolymer sol), and (iii) triethoxysilylation of a PDMS-lithium salt (PDMS–TES). The polymer sols were characterized by GPC, NMR, and FT-IR. The differences in properties between the structures were analyzed from their thermal stabilities and by using the swelling test. Thermal stabilities of these polymer sols were increased with the increase in the chain length of the D domain and with decrease in hydrolyzability. The swelling of films via polymer sols was decreased with the increase in the degree of crosslinking in sols.DQ silicone polymer sols were prepared by three different methods and characterized by NMR, FT-IR, and GPC. The thermal stabilities of these sols were increased with the increase of the chain-length of D unit and hydrolysis resistance. Also, the solvent uptake was increased with the decrease of the degree of crosslinking in sols