Chemical Reactions in Miscible Polymer Blends

可以使用可混溶的聚合物混合物进行化学反应，这为设计性能和/或工艺改进的新材料系统提供了机会。我们将研究以硅醇和膦酸基为氢键供体的可混溶聚合物与各种氢键受体聚合物的共混。这些体系是新型的可混溶共混物。这种特定的相互作用应该稳定硅醇的功能，并防止其与自身过早反应生成硅氧烷。然而，当温度高于较低的临界溶液温度时，应该会发生相分离和随后的硅氧烷形成，从而获得快速固化的聚合物网络。含磷结构在降低可燃性方面有广泛的用途。在一些系统中，通过在高温下加强凝聚相反应而导致“焦炭”或残留物的增加，并降低了易燃性。这将在含有膦酸官能团的可混溶共混物中进行研究，例如，在对位含氢键给体基团的苯乙烯共聚物中。

Chemical reactions can be made to occur using miscible polymer blends that offer the opportunity for the design of new material systems with enhancements in properties and/or processing. We will study miscible polymer blends containing silanol and phosphonic acid substituents as H-bond donors with a variety of H-bond acceptor polymers. These systems are new types of miscible blends. The specific interaction should stabilize the silanol function and prevent its premature reaction with itself to give siloxane. However, at temperatures above the lower critical solution temperature, phase separation and subsequent siloxane formation should occur, thereby giving fast-curing polymer networks. Phosphorus-containing structures have wide use for decreasing flammability. In some systems by enhance condensed-phase reactions at elevated temperatures leading to "char" or residue enhancement and decreased flammability. This will be studied in miscible blends containing phosphonic acid function e.g., with styrene copolymers containing the hydrogen-bond donor groups in the para position.