RUI: Synthesis of Amine-Terminated Polydimethylsiloxanes and Block Copolymeric Silicones

RUI：胺封端聚二甲基硅氧烷和嵌段共聚有机硅的合成

• 批准号: 8703597
• 负责人: Robert Patsiga
• 金额: $ 6.55万
• 依托单位: Indiana University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-01 至 1989-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8703597&HistoricalAwards=false
• 关键词: RUI; Synthesis; Amine; Terminated; Polydimethylsiloxanes

Polydimethylsiloxanes of narrow molecular-weight distribution and with primary and secondary amine end groups will be prepared by initiating the anionic polymerization of the cyclic trimer, hexamethylcyclotrisiloxane, with lithium bases containing protected nitrogen. After polymerization, the protecting group will be removed and the amino-ended silicones will be converted to block copolymers. Such copolymers will be composed of rubbery silicone segments and polar, rigid segments which should undergo microphase separation. Silicone- polyurethane and silicone-polyurea block copolymers will be prepared. These will be examined by small-angle x-ray scattering, thermal-mechanical analysis, and dynamic-mechanical analysis. Fundamental relationships between molecular weight of silicone or hard segment and separated domain size and thermal- mechanical properties will be derived. This research project is part of the NSF effort to enhance support for undergraduate research.

窄分子量聚二甲基硅氧烷 分布和具有伯胺和仲胺端基将 可以通过引发阴离子聚合来制备 环状三聚六甲基环三硅氧烷与锂碱 含有保护的氮。 聚合后， 保护基将被除去， 将转化为嵌段共聚物。 这样的共聚物将是 由橡胶状硅氧烷链段和极性刚性链段组成 其应当经历微相分离。 硅胶- 聚氨酯和硅酮-聚脲嵌段共聚物将被 制备 这些将通过小角度X射线检查 散射、热机械分析和动态机械分析 分析. 分子量之间的基本关系 硅树脂或硬链段以及分离的畴尺寸和热- 将得到机械性能。 该研究项目是NSF努力提高 支持本科生研究。