scholarly journals Aluminium trihydrate-filled poly(methyl methacrylate) (PMMA/ATH) waste powder utilization in wood-plastic composite boards bonded by MUF resin

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 3252-3269
Author(s):  
Matej Vovk ◽  
Milan Šernek
Keyword(s):  
Surface Modification ◽  
Methyl Methacrylate ◽  
Photoelectron Spectroscopy ◽  
Urea Formaldehyde ◽  
Contact Angles ◽  
Modulus Of Rupture ◽  
Wood Plastic Composite ◽  
Silane Coupling Agents ◽  
Poly Methyl Methacrylate ◽  
Plastic Composite

An alternative approach to producing a wood-plastic composite (WPC) from wood particles, aluminium trihydrate-filled poly(methyl methacrylate) (PMMA/ATH) waste powder, and melamine-urea-formaldehyde (MUF) resin is described. The surface of PMMA/ATH powder was modified with ureido- and amino-functional silane coupling agents at four different degrees of modification: 0.3%, 0.5%, 1.0%, and 2.0%. An X-ray photoelectron spectroscopy (XPS) analysis was executed on a silane-modified PMMA/ATH material, and the results revealed the presence of chemically bonded silanes on the PMMA/ATH surface. Contact angle measurements were also performed to calculate the surface free energies of the modified powders. Water contact angles of modified powders slightly decreased as surface free energy increased with the degree of surface modification. Mechanical tests of the composites showed that different degrees of surface modification had a significant influence on modulus of elasticity (MOE) and modulus of rupture (MOR) of the composite boards. However, there were no significant differences between the silanes used.

scholarly journals Surface Activation of Polylactic Acid-Based Wood-Plastic Composite by Atmospheric Pressure Plasma Treatment

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4673 ◽  
Author(s):  
Philipp Sauerbier ◽  
Robert Köhler ◽  
Gerrit Renner ◽  
Holger Militz
Keyword(s):  
Plasma Treatment ◽  
Polylactic Acid ◽  
Photoelectron Spectroscopy ◽  
Laser Scanning ◽  
Atmospheric Pressure Plasma ◽  
Contact Angles ◽  
Laser Scanning Microscopy ◽  
Wood Plastic Composite ◽  
Dbd Plasma ◽  
Plastic Composite

Wood-plastic composite (WPC) based on a polylactic acid (PLA) matrix is a promising material since it is biobased, degradable, sustainable, and 3D printable. However, due to its coloring, visible layers after 3D-printing, and small build volumes of these printers, a coating or gluing of parts might be required. This study investigates the influence of a dielectric barrier discharge (DBD) plasma treatment of PLA-based WPC to activate the surface and improve, e.g., coating capabilities. X-ray photoelectron spectroscopy (XPS) measurements showed the oxidation of the surface due to the formation of carbonyl and carboxyl groups. Laser scanning microscopy revealed a surface roughening after the treatment. Contact angles of water and diiodomethane decreased significantly after the plasma treatment and the consecutively calculated surface free energy increased. Finally, two practical adhesion tests revealed an improvement of the applied acrylic dispersion coating’s adhesion to the WPC surface: The assigned cross-cut class improved, and the pull-off strength increased from 1.4 to 2.3 N/mm2.

Surface modification of poly(methyl methacrylate) film by siloxane graft copolymers

1985 ◽  
Vol 18 (3) ◽  
pp. 580-582 ◽  
Author(s):  
Yuhsuke Kawakami ◽  
Toshiki Aoki ◽  
Yuya Yamashita ◽  
Masakazu Hirose ◽  
Akira Ishitani
Keyword(s):  
Surface Modification ◽  
Methyl Methacrylate ◽  
Graft Copolymers ◽  
Poly Methyl Methacrylate

Use of Sonication and Influence of Clay Type on the Enhancement in Physical Properties of Poly(methyl methacrylate) Nanocomposites

2007 ◽  
Vol 1056 ◽  
Author(s):  
Sharon Ingram ◽  
Hugh Dennis ◽  
Ian Hunter ◽  
John J Liggat ◽  
Craig McAdam ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Methyl Methacrylate ◽  
Physical Properties ◽  
Resin Composite ◽  
Clay Platelet ◽  
Poly Methyl Methacrylate ◽  
Cure Characteristics ◽  
Clay Type

ABSTRACTThe nature of the dispersion of a clay platelet in a resin composite will play an important role in the process of enhancement of the physical properties of that material. This paper describes studies of ultrasonically and mechanically mixed dispersion of various clays in methyl methacrylate (MMA) and reports the effects of organic surface modification on the rheology, suppression of settlement of filled systems, cure characteristics and final mechanical properties.

Wood-Plastic Composites Prepared by Waste Polypropylene and Toughening

2014 ◽  
Vol 878 ◽  
pp. 105-111
Author(s):  
Sen Chen ◽  
Yu Wen Guo ◽  
Jiu Li Ruan ◽  
Qi Qiao ◽  
Jian Qiang Zhang ◽  
...  
Keyword(s):  
Impact Strength ◽  
Modulus Of Rupture ◽  
Wood Plastic Composite ◽  
Practical Application ◽  
Plastic Composite ◽  
Styrene Butadiene ◽  
The Impact ◽  
Waste Polypropylene ◽  
Strength Improvement ◽  
Butadiene Styrene

The feasibility of wood-plastic composite (WPC) and efficiency of impact strength improvement by toughening agents were discussed using waste polypropylene (PP) from e-wastes as experimental materials. The researching results indicated that it could be used in manufacturing wood-plastic composite while the impact strength of waste PP decreased by 47.3% comparing with new PP. Adding polyethylene octene elastomer (POE) and styrene-butadiene-styrene (SBS) could effectively enhance the impact strength of WPC. When adding 15% of POE and SBS individually, the impact strength increased by 113.2% and 43.4%. The modulus of rupture (MOR) and modulus of elasticity (MOE) lowered when toughening agents were added, which should be made into consideration in practical application according to the property of materials comprehensively.

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