Polymers from multifunctional isocyanates, 13. Functional polymers from N‐substituted poly(maleimide‐alt‐isopropenyl isocyanate)s

Abstract

Alternating copolymers from isopropenyl isocyanate and N-substituted maleimides (Nphenyl, N-tetradecyl-and N-octadecylmaleimide) were synthesized for the first time. The reactive copolymers with regular structure have an isocyanate group in the constitutional repeating unit which allows modification and functionalization in a polymer analogous reaction. Functionalization has been demonstrated with examples of amphiphilic copolymers having the hydrophobic and the hydrophilic chain attached to the polymer backbone in a regular alternating fashion. A second example is an alternating copolymer with an NLO-chromophore attached to the polymer.

Reactions on Vinyl Isocyanate/Maleimide Copolymers: NLO-functionalized Polymers with High Glass Transitions for Nonlinear Optical Applications

“…After a polymerization time of about 16 h, the polymers can be precipitated in dry inert solvents. The copolymerization of maleic anhydride with vinyl as well as methylvinyl isocyanate is known to be alternating. − The same tendency can be found for the copolymerization of maleimide derivatives with vinyl or methylvinyl isocyanate, especially when both monomers are used in equimolar amounts (slight excess of isocyanate componentsee Experimental Part). The elemental analysis of all polymers showed a 1:1 composition of comonomers, and so the polymers can be regarded as almost alternating copolymers with one reactive isocyanate group per repeating unit.…”

Photoprocessable copolyimides with carbazole groups

“…1. We did not study the copolymerization behaviour of monomers 1 17,18) it is expected to be about alternating. In our copolymerization experiments, in which we used the isocyanate monomer in a small excess, we found always a 1 : 1 incorporation into the copolymer, independent of the conversion.…”

“…We want to emphasise the versatility of the polymer backbone, which was successfully used to prepare NLO polymers with high glass transition temperatures [15][16][17][18] . These polymers can combine the property of a photosensitive polymer resist (maleimide unit) with that of a semiconducting polymer in one polymer system.…”

Novel styrene/N-phenylmaleimidealternating copolymers with pendant sulfonimide acid groups for polymer electrolyte fuel cell applications

“…Allcock et al have obtained a similar result for polyphosphazenes. 16 It is well known that the radical polymerization of N-phenylmaleimide (PMI) with styrene affords alternating copolymers, [17][18][19] and the obtained copolymers exhibit structural stiffness and good thermal stability since the five-membered planar rings in the main chain hinder the rotation of the imide residues around the backbone. 20 In this study, we prepare alternating terpolymers, si-PPMSs, from styrene, PMI, and PMI with a sulfonimide acid group and characterize their electrolyte properties.…”