Novel Polymer Architectures

新型聚合物架构

• 批准号: 8712428
• 负责人: Harry Gibson
• 金额: $ 29.66万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-15 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8712428&HistoricalAwards=false
• 关键词: Novel; Polymer; Architectures

The synthesis and characterization of macromolecules whose polymeric nature does not solely derive from direct covalent bonding of the repeat units will be carried out. These materials, known as polyrotaxanes and polycatenanes, may be considered interpenetrating netwoks at the repeat unit (micromolecular) level. However, because the units are not covalently bonded, but are like links in a chain, they may have a large degree of independence from one another. As such, they are expected to have physical properties distinct from those of conventional polymers and copolymers. Use in a broad range of applications may be envisioned for these two new classes of materials, including engineering materials. In the latter case, attainment of toughness through physical, rather than chemical, bonding should avoid the brittleness that plagues current highly crosslinked polymeric systems used, for example, as matrixes for composites.

高分子的合成与表征， 聚合物的性质不仅仅来自于直接共价键， 将进行重复单元的键合。 这些 已知为聚轮烷和聚链烷的材料可以 认为在重复单元处的互穿链节 （微分子）水平。 但是，由于单位不 共价键合，但就像链中的链接一样，它们可能具有 彼此之间有很大程度的独立性。 制裁本身是 预期其物理性质不同于 常规聚合物和共聚物。 广泛应用于 可以设想这两类新的应用 材料，包括工程材料。 在后一种情况中， 通过物理而不是化学的方法来获得韧性， 结合应避免脆性，困扰目前高度 交联的聚合物体系，例如用作 复合材料.