Polymers for High Strength, Nonlinear Optics, and Electrical Conductivity

两个家庭的新聚合物将被制备：a）亚甲基烷氧基取代的聚（异氰酸酯）和未知的聚（异氰酸）和B）亚甲基烷氧基取代的聚（聚酰亚胺）和未知的聚（碳二亚胺）？聚（氰胺）或聚（胍）！以及每个家族内的共聚物。由于高度极性的重复单元，这些聚合物在高电场中极化时，预期产生类似于聚（偏二氟乙烯）的铁电固体。铁电固体具有作为压电体的应用（例如，传感器，如敏感麦克风）和非线性光学（模式转换器，调制器，Y分支干涉仪和定向耦合器）。本研究的其他特点是：（1）。聚（异氰酸）由于其高度的氢键和酰胺键的强度，预期在强度、压缩强度、韧性和氧化稳定性方面上级任何已知的合成纤维。2.）的情况。取代的聚（聚酰亚胺）将以手性形式制备并解聚。因此，一个新的碳二亚胺光学拆分程序的基础上的手性聚（碳二亚胺）的热解聚将被制备。手性碳二亚胺是一种全新的官能团。3.）第三章母体，未取代的聚（碳二亚胺），将成为共轭在中间质子化水平，并将被转化为一个高度导电的形式后，进一步质子化通过一个新的概念，质子化正孤子的产生。

Two families of new polymers will be prepared: a) methylenealkoxy-substituted poly(isocyanates) and the unknown poly(isocyanic acid) and b) methylenealkoxy-substituted poly(carbodiimides) and the unknown poly(carbodiimide) ?poly)cyanamide) or poly (guanidine)! as well as copolymers within each family. Because of the highly polar repeat unit, these polymers are expected, upon polarizing in high electric fields, to produce ferroelectric solids akin to poly (vinylidene fluoride). Ferroelectric solidss have applications as peizoelectrics (e.g., transducers such as sensitive microphones) and nonlinear optics (mode converters, modulators, Y-branch interferometers, and directional couplers). Other salient features of this research are: 1.) Poly(isocyanic acid), due to its high degree of hydrogen bonding and the strength of the amide linkage, is expected to be superior to any known synthetic fiber in strength, strength on compression, toughness and oxidative stability. 2.) The substituted poly(carbodiimides) will be prepared in chiral form and depolymerized. Thus, a novel carbodiimide optical resolution procedure based on thermal depolymerization of a chiral poly(carbodiimide will be prepared. The chiral carbodiimide is a fundamentally new functional group. 3.) The parent, unsubstituted poly(carbodiimide), will become conjugated at intermediate protonation levels and will be converted to a highly conducting form upon further protonation via a new concept of protonative positive soliton generation.