Crystallization and fusion kinetics of Poly(butylene terephthalate)/Titanium Dioxide

Polímeros

article

José Vinícius Melo Barreto¹  Antônio Anderson da Silva Gomes¹  Amanda Meneses Araújo¹  Andreas Ries²  Janetty Jany Pereira Barros³  Renate Maria Ramos Wellen¹ 

[1] Universidade Federal da Paraíba;Universidad Nacional de Asunción;Universidade Federal de Campina Grande

关键词: activation energy;    kinetics;    PBT;    phase transition;    TiO2;   

DOI  :  10.1590/0104-1428.20220087

学科分类：社会科学、人文和艺术（综合）

来源: Brazilian Academy Of Neurology

【 摘 要 】

In this paper, the crystallization, fusion, and activation energy (Ea) of PBT/TiO2 were thoroughly evaluated using DSC. Increasing the rates shifted the peaks of melt crystallization to lower temperatures while the fusions were almost unaffected. TiO2 hindered the melt crystallization of PBT and lower crystallization rates, i.e., CMAX and K’ were acquired, in general, the crystallinity degree (Xc) was 4% higher in PBT/TiO2 which is in the marginal error. Pseudo-Avrami and Mo models were applied to evaluate the melt crystallization kinetics; both fitted the melt crystallization quite well; deviations were observed at the beginning and the crystallization end most due to the nucleation and spherulites impingement during the secondary crystallization. Ea was evaluated using the Friedman model, considering the values of Ea less energy has to be removed from PBT/TiO2 when compared to PBT, specifically at 1% of TiO2.

【 授权许可】

CC BY