Melt and cold crystallization in a poly(3-hydroxybutyrate) poly(butylene adipate-co-terephthalate) blend

被引:8
|
作者
de Matos Costa, Anna Raffaela [1 ]
Santos, Raquel Marques [2 ]
Ito, Edson Noriyuki [3 ]
de Carvalho, Laura Hecker [4 ]
Canedo, Eduardo Luis [4 ]
机构
[1] Univ Fed Rio Grande do Norte, Programa Posgrad Ciencia & Engn Mat, BR-59078970 Natal, RN, Brazil
[2] Univ Fed Campina Grande, Programa Posgrad Engn Proc, BR-58429900 Campina Grande, PB, Brazil
[3] Univ Fed Rio Grande do Norte, Dept Engn Mat, BR-59078970 Natal, RN, Brazil
[4] Univ Fed Campina Grande, Dept Engn Mat, BR-58429900 Campina Grande, PB, Brazil
关键词
Polymer blends and alloys; Biodegradable polymers; Thermal properties; PHB; PBAT; MECHANICAL-PROPERTIES; BIODEGRADATION; DEGRADATION; MORPHOLOGY;
D O I
10.1007/s10973-019-08027-9
中图分类号
O414.1 [热力学];
学科分类号
摘要
Melt and cold crystallization characteristics of poly(3-hydroxybutyrate) (PHB) and poly(butylene adipate-co-terephthalate) (PBAT), two biodegradable polyesters of current industrial interest, as well as a PHB/PBAT blend, were investigated by nonisothermal tests of differential scanning calorimetry over a range of cooling/heating rates ranging between 2 and 64 degrees C min(-1). Although more difficult to study the crystallization under isothermal conditions, the quantitative evaluation of nonisothermal crystallization is required to understand and model industrial processes, which are conducted under nonisothermal conditions. While PBAT crystallizes completely during cooling, PHB and the PHB/PBAT blend show incomplete crystallization from the melt, the process being completed during the reheating stage. Notwithstanding the different crystallization behavior, crystallinity levels and melting points of PHB, PBAT and the blend have virtually identical melt crystallization temperatures, due perhaps to differences in the nucleating efficiency of the stereoregular homopolymer PHB and the random copolymer PBAT. These findings may be of enough interest for process engineers designing and controlling operations.
引用
收藏
页码:1341 / 1346
页数:6
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