Reduction of surface friction of natural rubber film coated with PMMA particle: Effect of particle size

2010 ◽  
Vol 115 (6) ◽  
pp. 3680-3686 ◽  
Author(s):  
Waranya Anancharungsuk ◽  
Wirach Taweepreda ◽  
Supa Wirasate ◽  
Rattaporn Thonggoom ◽  
Pramuan Tangboriboonrat
Keyword(s):  
Particle Size ◽  
Natural Rubber ◽  
Surface Friction ◽  
Particle Effect ◽  
Effect Of Particle Size ◽  
Rubber Film

Effect of particle size of leather wastes on the processing, vulcanization, and physico-mechanical properties of natural rubber/leather wastes composites

2021 ◽  
pp. 002199832110476
Author(s):  
William Urrego Yepes ◽  
Natalia Cardona ◽  
Sandra M Velasquez ◽  
Diego H Giraldo Vásquez ◽  
Juan C Posada
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Natural Rubber ◽  
Specific Energy Consumption ◽  
Tensile Modulus ◽  
Reduction Process ◽  
Natural Rubber Composites ◽  
Significant Difference ◽  
Leather Wastes ◽  
Effect Of Particle Size

In this work, the effect of particle size and the content of leather wastes on the processability, vulcanization, and mechanical properties of a natural rubber/leather wastes composites was studied. From a reduction process, leather waste was later sieved to classify particles smaller than 0.6 mm and particles between 0.84 and 2 mm, hereafter called fine and coarse residues, respectively. The morphology of the wastes was analyzed from scanning electron microscopy micrographs. Natural rubber/leather wastes composites with 20, 40, 60, 80, and 100 phr (parts per 100 parts of rubber) of treated leather wastes were obtained in a torque rheometer. Mixtures with coarse wastes exhibited a slightly higher torque than mixtures with the fine wastes; additionally, increasing the wastes content yields in an increased torque during the final stage of the process. The addition of leather wastes increased the vulcanization time and stiffness of the composites; additionally, materials with fine wastes showed lower vulcanization times compared to materials with coarse wastes. Composites with fine leather wastes exhibited higher density and tensile modulus than materials with coarse wastes; however, only the composites with 80 and 100 phr of wastes showed a statistically significant difference in hardness values. The specific energy consumption (SEC) was calculated from the results obtained with the torque rheometer; it was found that for all the formulations the SEC decreased as the phr of leather residues increased. It was found that it is possible to use leather wastes in natural rubber composites, to obtain adequate materials feasible for some applications.

Surface Modification of Natural Rubber Film with PMMA Nanoparticles Stabilized by Chitosan or its Derivative

2014 ◽  
Vol 875-877 ◽  
pp. 59-62
Author(s):  
Thanida Arpornwichanop ◽  
Nuttakun Kanjanathaworn ◽  
Pramuan Tangboriboonrat
Keyword(s):  
Surface Roughness ◽  
Antimicrobial Activity ◽  
Surface Modification ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Direct Contact ◽  
Miniemulsion Polymerization ◽  
Surface Friction ◽  
Layer By Layer ◽  
Rubber Film

Poly(methyl methacrylate) (PMMA) latex particles stabilized by chitosan (CS) or N,N,N-trimethylated chitosan (TMC) (50% degree of quaternization) were prepared via the miniemulsion polymerization. The spherical PMMA-CS nanoparticles (342 nm) were then deposited onto sulphur-prevulcanized natural rubber (SPNR) film via the Layer-by-Layer (LbL) technique. The aims were to reduce the surface friction of rubber film and to avoid the direct contact between SPNR and human skin which might cause the allergic problem for some hypersensitive users. Results confirmed the presence of PMMA-CS particles which caused an increase in the surface roughness of SPNR from 46 to 57. However, the PMMA-CS did not exhibit the antimicrobial activity. Therefore, the antimicrobial activity against E.coli and S.aureus of the SPNR film coated with PMMA-TMC particles is investigated.

Effect of particle size on erosion measurements and predictions in annular flow for an elbow

Wear ◽  
2020 ◽  
pp. 203579
Author(s):  
G. Haider ◽  
M. Othayq ◽  
J. Zhang ◽  
R.E. Vieira ◽  
S.A. Shirazi
Keyword(s):  
Particle Size ◽  
Annular Flow ◽  
Effect Of Particle Size

The Effect of Particle Size and Phospholipid on Growth and Fat Utilization of the Baby Pig

1951 ◽  
Vol 10 (4) ◽  
pp. 867-874 ◽  
Author(s):  
B. E. Sheffy ◽  
Carlos Acevedo Gallegos ◽  
R. H. Grummer ◽  
P. H. Phillips ◽  
G. Bohstedt
Keyword(s):  
Particle Size ◽  
Fat Utilization ◽  
Effect Of Particle Size
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