polyester

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polyester,

synthetic fiber, produced by the polymerization of the product formed when an alcohol and organic acid react. The outstanding characteristic of polyesters is their ability to resist wrinkling and to spring back into shape when creased. In addition, polyesters have good dimensional stability, wash and dry easily and quickly, and have excellent wash-and-wear or minimum-care characteristics; one of their principal uses is in apparel fabrics of this kind. Microfiber, which was introduced in 1986, is a variety of polyester that has extremely thin filaments (half as thick as silksilk,
fine, horny, translucent, yellowish fiber produced by the silkworm in making its cocoon and covered with sericin, a protein. Many varieties of silk-spinning worms and insects are known, but the silkworm of commerce is the larva of the Bombyx mori,
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 fibers). Polyesters are also used in casement curtains, throw rugs, and as a cushioning or insulating material.

polyester

any of a large class of synthetic materials that are polymers containing recurring -COO- groups: used as plastics, textile fibres, and adhesives
References in periodicals archive ?
Indeed, because of the presence of a hydroxi group and an acid group in ricinoleic acid, it was possible to obtain linear polyesters by its direct polyesterification.
2] were prepared and their catalytic activity in cartor oil polyesterification with TFA was evaluated, and the results are summarized in Table 1.
The kinetics of the polyesterification reaction between dicarboxylic acids and diols was studied for the first time by Flory in 1939 (2).
Although the reactions appearing in this kind of polyesterification are well known), (detailed kinetics studies of the esterification reaction and side reactions of different carboxylic acids and diols mixtures are limited (13).
After the Michael addition reaction was complete as demonstrated by NMR, polyesterification was performed by increasing the reaction temperature to 120[degrees]C, adding 0.
Polyesterification of ASPE was accomplished by moderate heating at reduced pressures in the presence of a titanate catalyst.
Aliphatic polyesters synthesized from polyesterification reaction, ring-open polymerization of cyclic monomer, and polycondensation have been investigated widely because of their superior mechanical properties, good processability and controllable degradation (1-5).
In the theory of polyesterification reaction developed by Flory (6), based on the reaction of a diacid and glycol, the reaction was known to be acid catalyzed.
Flory (3, 4), considering data for relatively high conversion to avoid large changes in polarity during the reaction, found that ethylene glycol-succinic acid polyesterification is predominately a trimolecular process with a partial order of two with respect to carboxylic acid and one with respect to alcohol.
The hydroxyl number of the glycolyzed product before removing the free glycol was used to determine the amount of the dibasic acid required for the polyesterification reaction.