Portal de Periódicos da CAPES

Elasticity studies on leather retanned with various types of acrylic polymers

2008; American Leather Chemists Association; Volume: 103; Issue: 11 Linguagem: Inglês

0002-9726

Jianzhong Ma, Hua Lu,

Cultural Heritage Materials Analysis

Different acrylic polymer retanning agents were synthesized with acrylic acid as the primary monomer and eight other acrylate monomers (MAA-methyl acrylic acid, EA-ethyl acrylate, BA- butyl acrylate, VAc-vinyl acetate, MA-methyl acrylate, AM-acrylamide, IA-Itaconic acid, HEA- 2-Hydroxyethyl acrylate) as comonomers. The eight copolymers were applied in the retanning process separately and the elasticity of the resultant leather was discussed. The results showed that the leather elasticity could be tested by calculating Young’s modulus of the elastic deformation, which was a variable region on the load-displacement curve, and Young’s modulus of the elastic deformation could serve as an independent parameter in characterizing leather’s physical properties. The relation between the elasticity and the dosage of copolymer was discussed, and it revealed that every comonomer had a proper dosage at which level the resultant leather showed the lowest Young’s modulus. Then the effects of the eight comonomers on leather elasticity were compared under the same condition. It showed that the soft comonomers, BA and EA, contributed more in leather elasticity than other selected comonomers.RESUMENDiferentes agentes recurtientes polimericos fueron sintetizados basados en acido acrilico como el monomero principal y ocho distintos acrilatos monomericos (“MAA”- acido metil acrilico, “EA”-etil acrilato, “BA”-butil acrilato, “VAc”-acetato vinilico, “MA”-metil acrilato, “AM”-acril amida, “IA”-acido itaconico, “HEA”-2hidroxietil acrilato, como co-monomeros. Los ocho co-polimeros se utilizaron separadamente en procesos de recurticion y la elasticidad resultante en los cueros se discutio. Los resultados demostraron que la elasticidad se podria comprobar por calculo el modulo de Young de la deformacion elastica, el cual es una region variable en la curva de carga contra el desplazamiento, y el modulo de Young en la deformacion elastica, podria servir como un parametro independiente para la caracterizacion de las propiedades fisicas del cuero. La relacion entre la elasticidad y la oferta del co-polimero fue discutida, y revelo que cada co-monomero tendria una oferta adecuada a la cual este nivel resulto en un minimo valor del modulo de Young. Los efectos de los ocho co-polimeros entonces sobre la elasticidad del cuero fueron comparados bajo la misma condicion. Se demostro que los co-monomeros mas blandos, BA y EA, contribuyeron mas a la elasticidad del cuero que otros co-monomeros seleccionados.