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.

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.

Type I allergy to natural rubber latex and Type IV allergy to rubber chemicals in children with risk factors

2001 ◽  
Vol 44 (3) ◽  
pp. 181-182 ◽  
Author(s):  
Eustachio Nettis ◽  
Porzia Dambra ◽  
Anna Lucia Soccio ◽  
Maria Paola Loria ◽  
Antonio Ferrannini ◽  
...  
Keyword(s):  
Risk Factors ◽  
Natural Rubber ◽  
Natural Rubber Latex ◽  
Type I ◽  
Rubber Latex ◽  
Type I Allergy ◽  
Type Iv ◽  
Type Iv Allergy

Prevalence of type I allergy to natural rubber latex and type IV allergy to latex and rubber additives in operating room staff with glove-related symptoms

2007 ◽  
Vol 28 (5) ◽  
pp. 557-563 ◽  
Author(s):  
Sara Miri ◽  
Zahra Pourpak ◽  
Alam Zarinara ◽  
Marzieh Heidarzade ◽  
Anoushirvan Kazemnejad ◽  
...  
Keyword(s):  
Natural Rubber ◽  
Operating Room ◽  
Natural Rubber Latex ◽  
Type I ◽  
Rubber Latex ◽  
Type I Allergy ◽  
Type Iv ◽  
Type Iv Allergy ◽  
Operating Room Staff
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