Mechanical and Thermal Properties of Thermoplastic Random Copolyesters Made from Lipid- Derived Medium and Long Chain Poly (x-hydroxyfatty acid) s


Autoria(s): Jose, Jesmy; Li, Shaojun; Bouzidi, Laziz; Leão, Alcides Lopes; Narine, Suresh S.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

03/12/2014

03/12/2014

05/07/2014

Resumo

The physical properties of novel thermoplastic random copolyesters [-(CH2)(n)-COO-/-(CH2)(n)-COO-](x) made of long (n=12) and medium (n=8) chain length -hydroxyfatty esters [HO-(CH2)(n)-COOCH3] derived from bio-based vegetable oil feedstock are described. Poly(-hydroxy tridecanoate/-hydroxy nonanoate) P(-Me13-/-Me9-) random copolyesters (M-n=11,000-18,500 g/mol) with varying molar ratios were examined by TGA, DSC, DMA and tensile analysis, and WAXD. For the whole range of P(-Me13-/-Me9-) compositions, the WAXD data indicated an orthorhombic polyethylene-like crystal packing. Their melting characteristics, determined by DSC, varied with composition suggesting an isomorphic cocrystallization behavior. TGA of the P(-Me13-/-Me9-)s indicated improved thermal stability determined by their molar compositions. The glass transition temperature, investigated by DMA, was also found to vary with composition. The crystallinities of P(-Me13-/-Me9-)s however, were unaffected by the composition. The stiffness (Young's modulus) of these materials was found to be related to their degrees of crystallinity. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40492.

Formato

8

Identificador

http://dx.doi.org/10.1002/app.40492

Journal Of Applied Polymer Science. Hoboken: Wiley-blackwell, v. 131, n. 13, 8 p., 2014.

0021-8995

http://hdl.handle.net/11449/112033

10.1002/app.40492

WOS:000334600500025

Idioma(s)

eng

Publicador

Wiley-Blackwell

Relação

Journal of Applied Polymer Science

Direitos

closedAccess

Palavras-Chave #biopolymers and renewable polymers #copolymers #polyesters #structure-property relations #thermoplastics
Tipo

info:eu-repo/semantics/article