期刊
POLYMER
卷 203, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2020.122748
关键词
Lignin; Biocomposites; PBAT; Mechanical properties; Uniaxial drawing
资金
- National Science Centre, Poland [2016/23/B/ST8/03509]
Kraft lignin particles (KLPs) were introduced into a commercial biodegradable poly(butylene adipate-co-terephthalate) (PBAT) matrix to produce composite material in a mini-extruder. The effect of KLPs content on the morphology, thermal, crystalline, and micro and macro mechanical properties of the PBAT/KLPs was investigated. Results showed that the tensile properties of PBAT improved with the addition of lignin. Dynamic Mechanical Analysis (DMA) showed that the storage modulus of composites increased with increasing of KLPs and Tg slightly shifted to a lower temperature. Differential scanning calorimetry (DSC) revealed that lignin strongly nucleates the crystallization of PBAT. Thermogravimetric analysis (TGA) showed that composites started to degrade at a lower temperature compared with neat PBAT while displaying higher ash residue. Small-angle X-ray scattering (SAXS) analysis showed that under a uniaxial stretch of the PBAT/KLP films nano and microcavities formed due to the debonding of PBAT from KLPs in their polar regions.
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