Effect of styrene maleic anhydride on physical and mechanical properties of recycled polystyrene wood flour composites

Abstract

In this work, the influence of three types of styrene maleic anhydride (SMA) oligomers on the adhesion of polystyrene wood plastic composites (WPC) was investigated. The composites were processed on a twin-screw co-rotating extruder below 200°C using 20 wt% of wood flour. The styrene maleic anhydride with different content of maleic anhydride groups, 30%, 25% and 20% (w/w) and levels of 1, 2 and 4% of coupling agents (styrene maleic anhydride 2000, styrene maleic anhydride 3000 and styrene maleic anhydride EF40) in the composite formulations were tested. Mechanical, physical and morphologic properties were evaluated. The styrene maleic anhydride improves the compatibility of hydrophilic wood flour with hydrophobic polystyrene matrix. It has been observed that the addition of styrene maleic anhydride increased the wood plastic composites mechanical properties with the incorporation of 2% wt of styrene maleic anhydride 2000. The mechanical properties showed to be dependent on content of maleic anhydride in the coupling agent. Treated and non-treated wood plastic composites showed similar density values, but the void content was reduced for treated composites. Scanning electron microscopy revel the better adhesion between polymer and matrix when coupling agent were used.

Properties and characterization of wood plastic composites made from agro-waste materials and post-used expanded polyester foam

“…5 In addition, the EPS foam has a short service life and it mostly ends up in either incineration or landfill. 4,6 Recycling rate of EPS foam is very low and expensive. Thus, most EPS foam wastes are sent to landfill and they contribute to environmental pollution, as they are non-biodegradable plastics.…”

Assessment of Morphological, Physical, Thermal, and Thermal Conductivity Properties of Polypropylene/Lignosulfonate Blends

“…The lignin density normally ranges from 1.35 to 1.50 g/cm 3 [ 20 ]. The blends theoretical density was determined based on the rule of mixtures and compared with the experimental values [ 21 ]. Figure 2 shows the density values for the measured and theoretical density of the blends studied.…”

Determination of technological properties of wood plastic nanocomposites produced by flat press reinforced with nano MgO

“…Additionally, they are employed in the production of electronics, catalysts, ceramics, oil, color, etc. [17][18][19][20] Lately, polymeric composites reinforced with nanophase have attracted a lot of attention in some industries and research areas, thanks to the development of nanotechnology in the field of materials science. In reality, nanocomposites have produced new varieties of polymeric composites in which nanoscale materials, such as carbon nanotubes, clay particles, and MgO, are used.…”