Bisphenol polycarbonates

Kambour, R. P. and Gruner, C. L., Effects of polar group incorporation on crazing of glassy polymers styrene-acrylonitrile copolymer and a bisphenol polycarbonate, J. Polym. Sci., Polym. Phys. Ed., 16, 703 (1978). 

Figure 1. Effect of Aroclor concentration on tensile moduli of bisphenol polycarbonates...

Carboxylated polyesters were prepared by extending hydroxyl-terminated polyester segments with dianhydrides. Carboxylated polyesters which were soluble in common lacquer solvents were effective in improving the adhesion of coatings on a variety of substrates when 1-10% was blended with cellulose acetate butyrate, poly(vinyl chloride), poly(methyl methacrylate), polystyrene, bisphenol polycarbonates, and other soluble polymers. 

Polymer stability varies greatly. Polymethyl methacrylate, bisphenol polycarbonate, and polyvinyl fluoride last for many years of outdoor exposure. The first two can be used for unbreakable windows in buses, schools, and elsewhere. The problem is that they become scratched. A... 

Polymer No. Bisphenol Polycarbonate Pr02 Polyester PrQ, Polyetherimide Pr02... 

In yet other polymers, such as with bisphenol polycarbonates both photodegradation and photo-initiated oxidative reactions take place simultaneously. The direct photoreaction is a Erie s rearrangement reaction, while the oxidative reactions result in chain scission and discoloration of the polymer. The chemical pathways involved in the latter process are not well understood. 

Several polyaryl ether-sulfones were found to be miscible with each other (Figure 1.2). AMS-AN copolymers have been found to be miscible with PMM A and with PEM A, and the blends exhibit LCST-type behavior. PS forms a miscible blend with polyxylenyl ether and with tetramethyl bisphenol polycarbonate, and PPO and P-sCL (poly-epsilon caprolcatone). SAN forms miscible blends with PMMA and PVC. 

A characteristic example of the phosgene-based process for manufacture of polycarbonates is the synthetic method used by Dow Chemical Co. A typical variation of the process uses bisphenol A, diphenyl carbonate, phosgene, cuprous chloride, and an oxygen-containing gas. Thus, when a phenol is reacted with phosgene, a diaryl carbonate is formed, which is then reacted with a bisphenol monomer to obtain a bisphenol polycarbonate and phenol, the latter of which after separation from the polycarbonate is reacted with more phosgene, and the diaryl carbonate thus produced is cycled back into the process for reaction with the bisphenol monomer. 

Other applications of IR spectroscopy in copolymer characterisation include styrene-glycidyl-p-isopropenylphenyl ether copolymers [4], styrene-isobutylene copolymers [5], vinyl chloride - vinyl acetate - vinyl fluoride terpolymers [6], vinylchloride - vinyl acetate copolymers [7], styrene copolymers [8], ethylene-vinyl acetate copolymers [9], graft copolymers, and butadiene-styrene [10] and acrylonitrile - styrene copolymers [11], polyurethane - polyacrylate [12], polymethylmethacrylate grafted high alpha cellulose [13], bisphenol-polycarbonate (PC) [14], bromobutyl isoprene [15], styrene - methacrylonitrile (SMAN) [16, 17] and styrene - acrylonitrile [18]. 

Perry K P, Jackson W J and Caldwell J R (1965) Elastomers based on polycyclic bisphenol polycarbonates, J Appl Polym Sci 9 3451-3463. 

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