期刊
COMPOSITES PART B-ENGINEERING
卷 56, 期 -, 页码 926-933出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2013.09.022
关键词
Polymer-matrix composites (PMCs); Mechanical properties; Thermal analysis; Compression molding
资金
- NSF [1114389, 1031828/1031829]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1031828] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1031829] Funding Source: National Science Foundation
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1114389] Funding Source: National Science Foundation
Fibers from the kenaf plant for composites are extracted using various retting processes. In this paper, we investigate the impact of retting by NaOH alkaline soak and enzymatic retting using pectinase on the crystallization and mechanical performance of a biopolymer blend of poly(hydroxybutyrate-co-valerate)/poly(butylene adipate-co-terephthalate). Two fiber lengths, 5 and 10 mm and a hybrid 1:1 fiber mixture were utilized. From DMA results, the NaOH retted fibers showed synergistic benefits of using hybrid fiber lengths on modulus. The pectinase retted samples did not show synergistic benefits of fiber lengths but composites of the same fiber length retted by pectinase outperformed the corresponding composites with NaOH retted fibers. The fiber retting method also affected recrystallization of the biopolymer. Pectinase retting showed a higher recrystallization temperature than NaOH retting. Transcrystallization resulting from fiber presence was analyzed using polarized optical microscopy. ESEM revealed smoother surfaces on the pectinase retted fibers compared to NaOH. (C) 2013 Elsevier Ltd. All rights reserved.
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