The effect of Poly-ethylene-co-glycidyl methacrylate efficiency and clay platelets on thermal and rheological properties of wood polyethylene composites.

Abstract

Global ecological concerns have resulted in an interest in renewable natural materials. Composites based on high density polyethylene (HDPE), wood fiber (Veneer) and containing coupling agents like nanoclay (NC) and poly-ethylene-co-glycidyl methacrylate (PEGMA) were made by melt compounding and then injection molding. In this study, the effects of two variable parameters namely nanoclay and coupling agent on the rheological and thermal properties of wood polyethylene composites (WPECs) were investigated. The study investigates the morphology phase, rheology behaviors and thermal properties by scanning electron microscope, capillary rheometer and thermal gravimetric analyzer. The SEM micrographs of the composites showed that the outer surfaces of the wood were coated by a section of amorphous lignin. The state of dispersion in HDPE/pine/clay composites was improved by EGMA because it could interact with pine flour in addition to clay. The interaction of reinforcement with coupling agent and HDPE matrix is strong based on the observation of the fracture surface of composites when EGMA is present. However the addition of 2.5% clay slightly lowered the initial degradation temperature (T d ) but did not improve the thermal stability. Obviously, all the composites materials exhibit viscoelastic values greater than those of neat HDPE.

PP/organoclay nanocomposites for fused filament fabrication (FFF) 3D printing

“…It is well-known that the dispersion of nanoclay in the polymer matrix depends on the surface peeling, followed by polymer chains diffusion into the nanoclay galleries [8]. The methods commonly employed to facilitate intercalation/exfoliation of the clay and maximize its interfacial contact with the polymer matrix include adding compatibilizers such as maleic anhydride grafted polymer; dimethyl maleate grafted polymer, as well as the surface modifications/treatments [6,[8][9][10][11][12][13]. This can significantly affect the matrix morphology and usually leads to proper clay intercalation instead of exfoliation [10,11,14].…”

Investigation of the Fire Performance of Polyamide 6-Based Composites with Halogen-free Flame Retardants and Synergistic Materials

“…The defects resulting from the particle pulling out of the matrix at different sizes can be seen in Figure 10 c–g, which indicates poor adhesion between particles and the polymer matrix. 50 …”

Study of the Thermal, Rheological, Morphological and Mechanical Properties of Biocomposites Based on Rod-Of Typha/HDPE Made up of Typha Stem and HDPE

“…Because of the high flammability of cellulose, the addition of wood makes the composite less thermally stable [32]. The TGA measurements indicate that, when the polymer is heated, its thermal stability is generally evaluated from the loss of mass and its molecular weight decreases sharply due to the degradation of the molecular chains [33].…”