Structural impact of hydroxyvalerate in polyhydroxyalkanoates (PHAscl) dense film monitored by XPS and photothermal methods

Journal of the Brazilian Chemical Society

Pontifícia Universidade Católica do Rio de Janeiro, Rio de Janeiro, Brazil¹  Universidade Estadual do Norte Fluminense, Campos dos Goytacazes, Brazil¹  Baptista, Gilson B.¹  Poley, Luiz H.¹  Silva, Marcelo G. da¹  Vargas, Helion¹  Rodriguez, Ruben S.¹ 

关键词: polymers;    photoacoustics;    XPS;    thermal properties;   

DOI  :  10.1590/S0103-50532005000500017

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) polymer dense films with thickness of 90 µm were obtained by the casting method and characterized using X-ray photoelectron spectroscopy, differential scanning calorimetric and photo-thermal methods. The HV molar fractions in the copolymer structure were 8, 14 and 22 mol %. The measured specific thermal capacity and the glass transition temperature of the P3(HB-co-x%HV) decrease for increasing hydroxyvalerate content following a similar trend.

【 授权许可】

Unknown