Behavior of polylactide/microcrystalline cellulose biocomposites: effects of filler content and interfacial compatibilization

2016-02-01
DOĞU, Berk
Kaynak, Cevdet
The purpose of this study was to investigate the effects of microcrystalline cellulose (MCC) content on the properties of polylactide (PLA) biocomposites; including the influences of maleic anhydride (MA) grafted PLA copolymer compatibilization. PLA/MCC biocomposites were produced by industrially compatible production techniques, i.e. twin-screw extrusion melt-mixing for compounding and injection molding for shaping of bulk specimens. SEM analysis and mechanical tests indicated that use of 3 wt% MCC resulted in very uniform distribution and consequently improved properties especially in terms of ductility and toughness. For instance, compared to neat PLA, the increases in the values of % strain at break and fracture toughness were 78 and 31 %, respectively. After MA compatibilization, these increases became as much as 82 and 55 %, respectively. Moreover, DSC and TGA indicated that use of MCC resulted in no significant changes in the transition temperatures and thermal degradation temperatures of PLA.

Suggestions

Properties of blends prepared from surface-modified low-density polyethylene and poly(vinyl chloride)
Akovali, G; Torun, TT (Wiley, 1997-03-01)
Improvement of adhesion between low-density polyethylene (LDPE) and poly(vinyl chloride) (PVC) in their blends was attempted by plasma modification of their surfaces. A series of different plasma treatments, vinyl chloride or carbon tetrachloride plasma for PE and acetylene plasma for PVC, were employed. In addition, an oligomeric copolymer of PE-VC was also tested in the blend. After modification, different degrees of improvement were obtained in mechanical properties, ranging from slight for acetylene pla...
Nanocomposites based on recycled poly(ethylene terepthalate)
Tolga, Aslı; Yılmazer, Ülkü; Department of Chemical Engineering (2005)
In this study, the effects of glycol type, organoclay type and concentration on the final properties of nanocomposites based on recycled poly(ethylene terephthalate) was investigated. For this purpose, first recycled PET was glycolysed and after that unsaturated polyester-montmorillonite nanocomposites were synthesized by using three different types of glycols (i.e. ethylene glycol (EG), propylene glycol (PG) and diethylene glycol (DEG)). As the first step, all the compositions were prepared by Cloisite 30B...
Effects of chain extension and branching on the properties of recycled poly(ethylene terephtkalate)-organoclay nanocomposites
Keyfoğlu, Ali Emrah; Yılmazer, Ülkü; Department of Chemical Engineering (2004)
In this study, the effects of chain extension and branching on the properties of nanocomposites produced from recycled poly(ethylene terephthalate) and organically modified clay were investigated. As the chain extension/branching agent, maleic anhydride (MA) and pyromellitic dianhydride (PMDA) were used. The nanocomposites were prepared by twin-screw extrusion, followed by injection molding. Recycled poly(ethylene terephthalate), was mixed with 2, 3 and 4 weight % of organically modified montmorillonite. Du...
Behaviors of polylactide biocomposites reinforced with microcrystalline cellulose
Doğu, Berk; Kaynak, Cevdet; Department of Metallurgical and Materials Engineering (2015)
The purpose of the first part of this thesis was to investigate the effects of microcrystalline cellulose (MCC) content on the properties of polylactide (PLA) biocomposites; including the influences of maleic anhydride (MA) grafted PLA copolymer (PLA-g-MA) compatibilization. PLA/MCC biocomposites were produced by industrially compatible production techniques, i.e. twin-screw extrusion melt-mixing for compounding and injection molding for shaping of bulk specimens. SEM analysis and mechanical tests indicated...
Mechanical properties of plasma surface-modified calcium carbonate-polypropylene composites
Akovali, G; Akman, MA (Wiley, 1997-02-01)
Calcium carbonate was surface-modified by plasma-polymerized acetylene and the effect of surface modification on the mechanical properties of calcium carbonate-polypropylene composites was investigated. Two different plasma polymerization conditions were selected and applied. Chemical structures of plasma-polymerized acetylene products were identified. Mechanical and thermal properties of the composites prepared were evaluated and the effects of surface modification on the extent of adhesion of filler to th...
Citation Formats
B. DOĞU and C. Kaynak, “Behavior of polylactide/microcrystalline cellulose biocomposites: effects of filler content and interfacial compatibilization,” CELLULOSE, pp. 611–622, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48526.