The Effect of Pre-Vulcanization Temperature on Mechanical and Rheological Properties of Starch Filled Natural Rubber Latex Compounds

2013 ◽  
Vol 858 ◽  
pp. 184-189
Author(s):  
Siti Rohana Yahya ◽  
Farah Nadiah Hamdan ◽  
Azura A. Rashid ◽  
Baharin Azahari
Keyword(s):  
Natural Rubber ◽  
Rheological Properties ◽  
Room Temperature ◽  
Natural Rubber Latex ◽  
Shear Thickening ◽  
Filler Loading ◽  
Latex Films ◽  
Rubber Latex ◽  
Thickening Behavior ◽  
Vulcanization Process

The main objective of this study was to investigate the effect of the pre-vulcanization temperature on mechanical and rheological properties of starch filled natural rubber (NR) latex films. The 10 phr filler loading of starch was added into the latex prior to the pre-vulcanization process at 60°C to 140°C. The dipped films were cured in the oven at 100°C for 20 minutes and cooled at room temperature for 24 hours before stripping. The rheological properties of NR latex compounds were studied based on the viscosity measurement. The tensile and tear tests of starch filled NR latex films were also carried out. The results indicated that the rheological properties of the latex compounds showed shear thickening behavior where viscosity was increased with the increase in shear rate and pre-vulcanization temperature proportionally. The pre-vulcanization temperature at 80°C showed the optimum mechanical properties of starch filled NR latex films.

Determination of Residual Vulcanization Accelerators in Natural Rubber Latex Films Using FTIR Spectroscopy

2005 ◽  
Vol 78 (1) ◽  
pp. 28-41 ◽  
Author(s):  
A. Temel ◽  
R. Schaller ◽  
M. Höchtl ◽  
W. Kern
Keyword(s):  
Thermal Decomposition ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Latex Films ◽  
Rubber Latex ◽  
Type Iv ◽  
Allergenic Potential ◽  
Type Iv Allergy ◽  
Vulcanization Process

Abstract Many vulcanization accelerators are well known contact sensitizers (Type IV allergy) and therefore pose a serious problem in latex applications like gloves and condoms. In this study, a vulcanization system for NR latex based on diisopropylxanthogen polysulfide (DiPXP) and Zn-diisononyl dithiocarbamate (ZDiNC) was investigated. The thermal decomposition of DiPXP during and after the vulcanization process was assessed. FTIR methods for the determination of residual vulcanization accelerators ZDiNC and DiPXP in latex films and extracts therefrom were developed. When appropriate conditions are selected for the production of NR latex films, the accelerator DiPXP was no more detectable in extracts from the finished NR latex product. The use of thermally decomposable vulcanization accelerators is a way towards NR latex products with significantly reduced allergenic potential.

Centrifuging Effect on the Structure and Property of Natural Rubber Latex Films

2003 ◽  
Vol 42 (4) ◽  
pp. 503-514 ◽  
Author(s):  
M. F. Mina ◽  
M. M. Alam ◽  
F. Akhtar ◽  
K. Imaizumi ◽  
S. Yoshida ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Latex Films ◽  
Rubber Latex ◽  
Structure And Property

Preparation and properties of g‐C 3 N 4 on natural rubber latex films

2020 ◽  
Vol 41 (8) ◽  
pp. 3124-3134
Author(s):  
Jing Chen ◽  
Lusheng Liao ◽  
Fuquan Zhang ◽  
Tianming Gao ◽  
Jiazhao Lin ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Latex Films ◽  
Rubber Latex

Simulation of Irradiation-Based Processing System for Natural Rubber Vulcanization

2017 ◽  
Vol 751 ◽  
pp. 252-257
Author(s):  
Kittiya Kosaentor ◽  
Ekkachai Kongmon ◽  
Chitrlada Thongbai ◽  
Sakhorn Rimjaem
Keyword(s):  
Electron Beam ◽  
Natural Rubber ◽  
Beam Energy ◽  
Natural Rubber Latex ◽  
Processing System ◽  
Electron Beam Energy ◽  
Rubber Latex ◽  
Electron Beam Processing ◽  
Study Results ◽  
Vulcanization Process

Natural rubber is an important export product of Thailand, which presently contributes about 40% of global production and export. In order to make the natural rubber latex to be durable material, the proper vulcanization process is needed. In typical vulcanization process, chemical substances are added to improve the rubber properties. This may cause some problems e.g. toxicity, blooming effects and unpresented smell due to the additive substances. Vulcanization using an accelerated electron beam does not need to add possibly toxic chemical compounds, especially sulfur. Thus, it was proved to be an alternative method for high quality natural rubber vulcanization. This paper presents about simulation of electron beam irradiation for natural rubber vulcanization with variable electron beam energy and current of 0.5-4 MeV and 10-100 mA, respectively. These ranges of the electron beam energy and current will give adjustable absorb dose, which is the most important parameter for electron beam processing. The absorb energy and its distribution in the natural rubber latex are simulated by using a Monte Carlo method program, GEometry ANd Tracking 4 (GEANT4), with the aim to find the optimal conditions of electron beam properties for sufficient natural rubber vulcanization. Study results of the energy distribution for electron beam penetration in the natural rubber latex are presented and discussed in this paper.

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