Bisphenol monomer 3-

Extraction or dissolution almost invariably will cause low-MW material in a polymer to be present to some extent in the solution to be chromatographed. Solvent peaks interfere especially in trace analysis solvent impurities also may interfere. For identification or determination of residual solvents in polymers it is mandatory to use solventless methods of analysis so as not to confuse solvents in which the sample is dissolved for analysis with residual solvents in the sample. Gas chromatographic methods for the analysis of some low-boiling substances in the manufacture of polyester polymers have been reviewed [129]. The contents of residual solvents (CH2C12, CgHsCI) and monomers (bisphenol A, dichlorodiphenyl sulfone) in commercial polycarbonates and polysulfones were determined. Also residual monomers in PVAc latices were analysed by GC methods [130]. GC was also... 

Figure 14.4.1 The repeating units of the monomer bisphenol A used to construct the polymeric thermoset material used in shatterproof glass.

Phenol is also used to manufacture several important monomers. Bisphenol A, a phenol derivative, is used to make very strong polycarbonate plastics and epoxy resins (the kind you buy in two tubes and mix to make glue). Ocher applications of epoxy resins include paints, fiberglass binder, and construction adhesives. 

When product made with a 2 1 ratio of BPA to sodium hydroxide was extracted with boiling hexane, a 45% yield of monomer bisphenol-A bischloroformate could be isolated from the hexane-soluble fraction. The GPC curves of the product isolated by the boiling-hexane extraction are shown in Figure 4. The GPC curve indicates that a small amount... 

Synthesis. Five different polyaryl ethers were made from the condensation product, resulting from the reaction of phenol and levulinic acid, commonly referred to as diphenolic acid, and one or more of the following monomers bisphenol A, dichlorodiphenyl sulfone, 2,6-dichloro-benzonitrile, and 4,4 -difluorobenzophenone. The resulting polymers were subsequently methylated such that the common monomer becomes (1) ... 

The monomer bisphenol A is made by the following reaction. Suggest a detailed mechanism. 

Chemical properties Polycarbonate is a generic term for polymers that contain carbon acid esters in the chains of their molecules. Pale yellow colour on manufacture due to impurities in the monomers (bisphenol-A), which is masked with blue dyes. PC is a polar polymer and is dissolved by chlorinated solvents. Almost self-extinguishing on burning. Poor resistance to chemicals and weathering. 

Some) monomers Bisphenol A Lacquers used in dental treatment, internal coatings for metal containers such as food cans... 

The strength of one kind of polymer, called Lexan, is so great that it is used to make bullet-proof windows. The models show the starting monomers bisphenol-A (C15H15O2) and phosgene (COCI2) and a repeating unit of Lexan. 

Epoxy resins represent a class of step-growth polymer familiar to anyone who has used epoxy to glue together a broken object. An epoxy resin consists of two components a fluid prepolymer composed of short polymer chains with reactive epoxides on each end, and a hardener, usually a diamine or triamine that ring opens the epoxides and cross-links the chains together. The prepolymer is formed by reacting two difunctional monomers, bisphenol A and epichlorohydrin. 

Entry Monomer Bisphenol Temp. rc) Mw xlO Mn xia MwIMn (dIVg)... 

CycUc monomer, bisphenol A and higher linear and cyclic fragments of the chain (see Ref)... 

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