Composites from poly(lactic acid) and bleached chemical fibres: Thermal properties

被引：56
作者：
Espinach, F. X. [1 ]
Boufi, S. [2 ]
Delgado-Aguilar, M. [3 ]
Julian, F. [1 ]
Mutje, P. [3 ]
Mendez, J. A. [3 ]
机构：
[1] Univ Girona, Dept Org Business, Design Dev & Prod Innovat, Girona 17071, Spain
[2] Univ Sfax, Fac Sci, LMES, BP 1171-3000, Sfax, Tunisia
[3] Univ Girona, Grp LEPAMAP, Dept Chem Engn, C-M Aurelia Capmany 61, Girona 17003, Spain
来源：
COMPOSITES PART B-ENGINEERING | 2018年 / 134卷
关键词：
Composite materials; Cellulose fibres; Thermal properties; Poly(lactic acid); FILLED POLYPROPYLENE COMPOSITES; GROUND WOOD PULP; MECHANICAL-PROPERTIES; MICROMECHANICAL ANALYSIS; CELLULOSE; BIOCOMPOSITES; POLYLACTIDE; PLA;
D O I：
10.1016/j.compositesb.2017.09.055
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Poly (lactic acid) (PLA) reinforced with bleached kraft soft wood (BKSW) biocomposites with fibre content up to 35% were processed by kinetic mixing and injection moulding. The cellulosic filler was a commercial chemical bleached kraft soft wood pulps composed of well individualized fibres free from lignin with diameter about 20 pm and length within micron scale. The effect of fibre addition on the thermal properties of composites was investigated using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermal gravimetric analysis (TGA) and thermo-mechanical analysis (TMA). In a previous work, it was demonstrated that fibre inclusion on PLA enhanced the modulus as well as the strength. Fibre addition promoted the crystallization of PLA by favouring the heterogeneous nucleation and accelerating the crystallization kinetic, without adversely altering the thermal stability. The DMA analysis confirmed the strong stiffening effect brought by the addition of fibres at the glassy as well as the rubbery domains. The presence of fibres had also a beneficial effect on the dimension stability by lowering the thermal expansion coefficient of composites. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：169 / 176
页数：8
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