Poly alkylene dicarboxylate s

The monomers used in the polycondensation reaction for the production of poly(alkylene dicarboxylate)s are basically from petrochemical sources. However, some of them can be obtained from renewable sources. For example, 1,3-propanediol can be produced by fermentation of glycerol, which is a by-product from biodiesel or plant oil production. Succinic acid can be synthesized from glucose or whey by bacterial fermentation in very high yields. ... 

Scheme 6.10 Synthesis of poly(alkylene dicarboxylate)s by the polycondensation reaction.

Poly(alkylene dicarboxylate)s are obtained in polycondensation reaction which is usually performed as the direct poly condensation of diols with diacids or as a transesterification reaction, in which case the starting monomer is the dialkyl ester of the corresponding diacid (Scheme 6.10). 

Attempts had been made to synthesise polyesters based on phthalic acid as the diacid component, but these products were amorphous, had low softening points, and were rapidly attacked by organic solvents and acids and bases. Research into polyesters made by the reaction of terephthalic acid (or esters thereof) with aliphatic diols, led to the discovery of polyesters of high commercial value poly(alkylene terephthalate)s [4]. This pairing of diols with terephthalic acid eventually led to the most commercially successful aromatic polyesters, but other synthetic pathways were also investigated towards such products in the early days of polyester development. These included the self-condensation of hydroxy acids of the structure -H0-R-Ph-C02H, where R-OH is para to the acid group and R is -(CH2)- or -(CH2)2- [5], and reactions of aliphatic diacids with 1,4-dihydroxy benzene and similar aromatic diols [6, 7]. Also synthesised about the same time were polyesters based on C2-Cg aliphatic diols and any of the isomeric naphthalene dicarboxylic acids [8]. 

Eastman also have extant intellectual property on a process specifically for the recovery of naphthalene dicarboxylic acid from poly(alkylene naphthalate)s [181],... 

R. Katsarava, V. Beridze, N. Arabuli, D. Kharadze, C.C. Chu, C.Y. Won, Amino acid-based bioanalogous polymers. Synthesis, and study of regular poly(ester amide)s based on bis(a-amino acid) a, w-alkylene diesters, and aliphatic dicarboxylic acids, J. Polym. Sci. Part A Polym. Chem. 37 (1999) 391-407. 

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