Effect of chemical treatment of wood flour on the properties of styrene butadiene rubber/polystyrene composites

Abstract

ABSTRACT:Composites from SBR/PS blend and the chemically treated wood flour have been prepared. The materials used for such treatment are NaOH, MAN, MANglycidyl methacrylate, and silane coupling agent, used to improve the dispersion of wood flour in the SBR/PS blend. The effects of chemical treatment on curing characteristics, and physicomechanical and electrical properties of SBR/PS composites were studied. The rheological as well as the mechanical parameters were improved by using the modified wood flour with MAN-glycidyl methacrylate (SMG), followed by SM obtained at 15 phr, while the other treatments slightly affect these parameters. The permittivity e 0 and dielectric loss e 00 were measured in the frequency range from 100 Hz up to 100 kHz and at temperatures ranging from 30 up to 908C. The dielectric investigations indicate that the samples containing wood flour treated with both SMG and SM increase the values of e 0 and decrease those of e 00 , which allow such samples to be used in insulation purposes. The increase in the relaxation time and the crosslinking density n for such composites indicate the increase in filler-polymer interaction rather than filler-filler interaction.

Thermoplastic Composites Based on Renewable Natural Resources: Unplasticized PVC/Olive Husk

“…Figure 3 shows the influence of OH loading on the water uptake pattern for PVC composites after seven days of immersion. Water absorption is mainly due to the hydrogen bonding of water molecules with the hydroxyl groups on Unplasticized PVC/Olive Husk 849 the cell walls of the lignocelluloses (OH in this case) (11)(12)(13). In this respect, the incorporation of OH has resulted in an increase water uptake for the PVC composites compared to the control.…”

Effect of Fiber Type and Coupling Treatment on Properties of High-Density Polyethylene/Natural Fiber Composites

“…Thermoplastics such as high-density polyethylene (HDPE) (Herrera-Franco and Valadez-Gonzalez 2004;Panthapulakkal and Sain 2007), low-density polyethylene (LDPE) (Georgopoulos et al 2005), polypropylene (PP) (Karmarkar et al 2007;Lopez et al 2012), poly(vinyl chloride) (PVC) (Shah and Matuana 2005;Sombatsompop et al 2003), poly(lactic acid) (PLA) (Huda et al 2006), polystyrene (PS) (Mansour et al 2006), and some recycled thermoplastics (Jayaraman and Bhattacharyya 2004;Lei et al 2007) have been compounded with natural fibers. Furthermore, some natural fibers such as bagasse (Sheshmani 2013), rice straw (Ashori 2013), palm (Abdullah et al 2012), flax (Bledzki et al 2009), and other agroforestry wastes (Hamid et al 2013) have been used as a reinforcement into thermoplastics.…”

Comparison on the properties of the wheat straw/rubber composites by adding graphite/carbon fiber

“…As well known, the change in torque is directly related to the crosslinking degree of the vulcanized rubber composites during the curing process. The minimum torque ( M L ) was an indirect measure of the viscosity of the un‐vulcanized rubber composites and the maximum torque ( M H ) was to the crosslink density and the stiffness . The curing experimental test results of non‐filled WSRCs and the WSRCs filled with conductive fillers loading varied from 0 to 15 phr, in steps of 5 phr, were summarized in Table .…”