Study of the miscibility of poly (lactic acid) / poly (butylene adipate-co-terephthalate) blends prepared by solvent-casting method

被引:0
作者
Cobo, Fernanda Nardo [1 ]
de Santana, Henrique [1 ]
de Carvalho, Gizilene Maria [1 ]
Yamashita, Fabio [2 ]
机构
[1] Univ Estadual Londrina, Dept Quim CCE, Rod Celso Garcia Cid,Pr 445 Km 380,Campus Univ, BR-86057970 Londrina, Parana, Brazil
[2] Univ Estadual Londrina, Dept Ciencias & Tecnol Alimentos CCA, Rod Celso Garcia Cid,Pr 445 Km 380,Campus Univ, BR-86057970 Londrina, Parana, Brazil
来源
MATERIA-RIO DE JANEIRO | 2021年 / 26卷 / 02期
关键词
Poly (lactic acid); Poly (butylene adipate-co-terephthalate); Blends; Misicibility; Viscosity; Raman spectroscopy; MECHANICAL-PROPERTIES; ADIPATE-CO-TEREPHTHALATE); RAMAN; BEHAVIOR; MORPHOLOGY; PLA;
D O I
10.1590/S1517-707620210002.1276
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The production of PLA / PBAT blends aims to overcome the disadvantages that each polymer had individually, such as fragility, processability and cost limitations. In this study, we investigated the miscibility and properties of biodegradable films of PLA - Poli (lactic acid), PBAT-Poli (butylene adipate-co-terephthalate) and their blends with proportions of 95/5, 70/30, 30/70 and 5/95 PLA / PBAT, respectively, produced by the casting method. The blends produced were characterized by the techniques of Raman spectroscopy, differential scanning calorimetry (DSC), thermogravimetry (TGA), scanning electron microscopy (SEM), diluted solutions viscosimetry and mechanical tensile testing. The Raman spectra, glass transitions temperature (Tg), and TGA analysis indicated that the polymers are immiscible in the compositions studied. Mechanical analyzes point to a decrease in the stiffness of the blend with the addition of PBAT. The interaction parameters, obtained by viscosimetry analysis of diluted solutions, suggest partial miscibility of the blend with 5% of PBAT. The study of the miscibility and properties of the PLA / PBAT blends obtained by solvent evaporation will enable the production of new materials by different techniques aiming at new applications for this material.
引用
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页数:12
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