 polyether and polycarbonate, Pc, glycols, 4-fort diphylmethane disocyanate, 1-1-methylenibus, 4-isocyanatebenzene, 1-fort butanedial, and poly-oxy-tetra-methylene, glycol, Ptmg, and Ptmg-incorporating dimethyl groups, Ptgx, and methyl-side groups, Ptgl, were used to create polyurethane elastomers, PUEs. Poly-oxy-tetra-methylene, glycol, Ptmg, and Ptmg-incorporating dimethyl groups, Ptgx, and methyl-side groups, Ptgl, were also used to create polycarbonate glycol, Pc, glycol, random copolymers with hexamethylene, C6, and tetramethylene, C4, units between carbonate groups with various composition ratios, C4 slash C6 equals 0 slash 100, 50-fiftieths, 70-thirtieths, and. This article was authored by Sata Harunakamura, Matsuhisa Furukawa, Ken Kojio, and others. We are article.tv, links in the description below.