scholarly journals PARAMETERS INTERACTION OF RADIATION VULCANIZED NATURAL RUBBER LATEX (RVNRL) SENSITIZED BY N-BUTYL ACRYLATE

2007 ◽  
Vol 08 (4) ◽  
pp. 22-30
Author(s):  
Hugo CHIRINOS
Keyword(s):  
Response Surface Methodology ◽  
Natural Rubber ◽  
Response Surface ◽  
Process Parameters ◽  
Gamma Rays ◽  
Butyl Acrylate ◽  
Natural Rubber Latex ◽  
High Concentration ◽  
Mathematical Relationship ◽  
Rubber Latex

Response surface methodology was utilized to conceive a mathematical relationship between the crosslinking efficiency of natural rubber latex vulcanized by gamma rays, and the process parameters (n-butyl acrylate and KOH). The radiation vulcanization of latex can be optimized at low vulcanization dose (VD) and at high concentration of n-BA. This relationship can be estimated by the following model. See on the magazine.

Preparation, Adhesive Performance and Stability of Natural Rubber Latex Grafted with N-Butyl Acrylate (BA) and Methyl Methacrylate (MMA)

2008 ◽  
Vol 47-50 ◽  
pp. 1149-1152 ◽  
Author(s):  
Pranee Chumsamrong ◽  
Jakkarin Mondobyai
Keyword(s):  
Shear Strength ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Butyl Acrylate ◽  
Natural Rubber Latex ◽  
Peel Strength ◽  
Rubber Latex ◽  
Weight Percentage ◽  
Monomer Ratio ◽  
Lap Shear

In order to study the potential of increasing the weather stability of natural rubber latex for use as a water-based contact adhesive, the natural rubber latex was modified by graft copolymerization with n-butyl acrylate (BA) and methyl methacrylate (MMA). The grafting reaction was carried out using emulsion polymerization at 60°C. Potassium persulfate was used to initiate polymerization. Four different weight percentage ratios of BA to MMA used in this work were 80:20, 70:30, 60:40 and 50:50. Percentage conversion of the monomer of all latexes prepared was ≥ 79.8 %. The grafting efficiency of grafted natural rubber latexes with a different monomer ratio tended to decrease with an increase of MMA. The adhesion property was characterized by 90° peel strength and 180° lap shear tests. The shear strength value of grafted natural rubber latexes increased with an increase of MMA content. The grafted latex with the monomer ratio of 50:50 possessed higher shear strength than natural rubber latex. The peel strength value of grafted natural rubber latexes seemed to lower than that of natural rubber latex. The weather stability of the modified latex was characterized using thermogravimetric analysis (TGA) and also the peel samples were left in the open air for 45 days before testing. The results showed that grafted natural rubber latex had a higher weather stability than natural rubber latex.

scholarly journals Grafting of n-butyl acrylate with natural rubber latex film by gamma radiation: a reaction mechanism

1970 ◽  
Vol 5 (1) ◽  
pp. 81-88 ◽  
Author(s):  
KMZ Hossain ◽  
AM Sarwaruddin Chowdhury
Keyword(s):  
Reaction Mechanism ◽  
Natural Rubber ◽  
Butyl Acrylate ◽  
Natural Rubber Latex ◽  
Latex Film ◽  
Cross Linking ◽  
Swelling Ratio ◽  
Cross Link ◽  
Rubber Latex ◽  
The Cross

Natural rubber latex (NRL) and n-butyl acrylate (n-BA) were blended and irradiated at various absorbed doses by gamma rays from Co-60 source at room temperature. The stabilizing effect was determined by measuring the pH and viscosity of NRL with n-BA with the storage time of five weeks. The cross-link density, swelling ratio of the radiation vulcanized rubber film were measured. The cross-link density of the n-BA grafted NRL film was found increasing and the swelling ratio of that film decreasing with the increased absorbed dose. The optimum radiation dose for better cross-linking of natural rubber latex blended with five parts per hundred rubber (phr) n-BA was found 15 kGy absorbed dose. Based on the cross-linking properties a probable cross-linking reaction mechanism for the n-BA grafted natural rubber latex film was developed. Keywords: Natural rubber latex, n-butyl acrylate, Irradiation, Swelling ratio, Cross-link, Reaction mechanism. DOI: 10.3329/diujst.v5i1.4386 Daffodil International University Journal of Science and Technology Vol.5(1) 2010 pp.81-88

scholarly journals Raw natural rubber latex-based bio-adhesive for the production of particleboard: formulation and optimization of process parameters

RSC Advances ◽  
2021 ◽  
Vol 11 (46) ◽  
pp. 28542-28549
Author(s):  
Md Nazrul Islam ◽  
Abdullah Adib ◽  
Nabila Hasan Dana ◽  
Atanu Kumar Das ◽  
Md Omar Faruk ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Formic Acid ◽  
Process Parameters ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Optimization Of Process Parameters

In this study, bio-adhesives from natural rubber latex (NRL) were combined with starch and formic acid to fabricate jute stick-based particleboards (JSPs).

scholarly journals Reduction of residual n-butyl acrylate sensitizer in radiation vulcanized natural rubber latex.

1995 ◽  
Vol 68 (11) ◽  
pp. 788-793 ◽  
Author(s):  
Chunlei Wang ◽  
Fumio YOSHII ◽  
Kenichiro HYAKUTAKE ◽  
Keizo MAKUUCHI
Keyword(s):  
Natural Rubber ◽  
Butyl Acrylate ◽  
Natural Rubber Latex ◽  
Rubber Latex ◽  
Residual N

Effect of Poly (Butyl Acrylate) and Poly (Ethylene Oxide) Modified Sago Starch on Natural Rubber Latex Films Physical Properties

2015 ◽  
Vol 754-755 ◽  
pp. 261-265
Author(s):  
M.M. Afiq ◽  
N.T. Sean ◽  
A. Rashid Azura
Keyword(s):  
Ethylene Oxide ◽  
Natural Rubber ◽  
Butyl Acrylate ◽  
Natural Rubber Latex ◽  
Rubber Matrix ◽  
Sago Starch ◽  
Rubber Latex ◽  
Packed Structure ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Sago starch is modified with 1 wt % Poly butyl acrylate (PBA) and Poly ethylene oxide (PEO) monomer and 1 wt% of initiator, potassium persulfate (PPS) at temperature 80°C for 2 hours. Modified sago starch is cooled under room temperature for 24 hours prior to Natural Rubber Latex (NRL) compounding process. Results indicates that NRL films with PBA modified sago starch have higher mechanical properties compared to PEO modified sago starch and unmodified sago starch. Swelling test indicates that PEO gives lowest percentage of swelling and crosslink density. This is due to higher reaction probability that produce more closely packed structure with NRL matrix compared to PBA which only improved the compatibility of sago starch particle with rubber matrix. Thus, chemically modified sago starches are preferable to be used as fillers to produce better interaction between fillers and rubber matrix.

Blending of Polyvulcanize Natural Rubber

2014 ◽  
Vol 879 ◽  
pp. 224-229
Author(s):  
Wan Mohd Faruq Wan Mohd Ridzwan ◽  
Dzaraini Kamarun ◽  
Azemi Samsuri ◽  
Ahmad Faiza Mohd ◽  
Che Mohd Som Said
Keyword(s):  
Thin Film ◽  
Tensile Strength ◽  
Natural Rubber ◽  
Butyl Acrylate ◽  
High Performance ◽  
Natural Rubber Latex ◽  
Butyl Methacrylate ◽  
Rubber Latex ◽  
Elongation At Break ◽  
Acrylate Copolymer

Natural rubber (NR) latex is widely used in the manufacture of thin film barrier products such as gloves and condom. However, due to its low Tg, film casted from NR latex is soft and tacky, and needed to be strengthened to produced high performance products. Films of prevulcanized natural rubber latex (PVNR) blended with nanosized copolymer of n-butyl acrylate/butyl methacrylate (BA/BMA) were prepared at three different ratios of acrylate copolymer: PVNR. The tensile strength and elongation at break of films prepared decreased with increasing ratios of acrylate copolymer:PVNR. FESEM images showed the occurrence of agglomeration of the acrylate copolymers with PVNR molecules. The degree of agglomeration of the blended molecules increased with percentages of copolymer added. The decrease in the tensile strength and elongation at break may due to the agglomeration of the blended molecules suggesting poor dispersion and/or destabilization of PVNR molecules.

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