China 
Africa 
Explore chapters and articles related to this topic
Elastomeric Polymers
Published in Kathleen Hess-Kosa, Building Materials, 2017
The monomer chloroprene is a regulated chemical and listed by the IARC as a possible human carcinogen. Chloroprene's sweet ether-like odor threshold (15 ppm) is 15 times greater than the NIOSH recommended limit (1 ppm), one and a half times the ACGIH recommended limit (10 ppm), and less than the OSHA limit (25 ppm).
Chemicals from Olefin Hydrocarbons
Published in James G. Speight, Handbook of Petrochemical Processes, 2019
Chloroprene (2-chloro 1,3-butadiene, CH2=CHCCl=CH2), a conjugated non-hydrocarbon diolefin, is a liquid that boils at 59.2°C (138.6°F) and while only slightly soluble in water it is soluble in alcohol. The main use of chloroprene is to polymerize it to neoprene rubber.
Synthesis of Reactants and Intermediates for Polymers
Published in Charles E. Carraher, Carraher's Polymer Chemistry, 2017
Chloroprene, used for the production of neoprene rubber, is obtained by the dehydrochlorination of dichlorobutene. The latter is produced by the chlorination of 1,3-butadiene, which in turn is synthesized from acetylene.
Investigate the effect of ground tyre rubber as a reinforcement filler in natural rubber hybrid composites
Published in Soft Materials, 2023
P. Kaliyappan, M. Dhananchezian
Despite the fact that different nano clay ratios, sulfur, dicumyl peroxide, and combinations between them were mixed with Ethylene-Propylene-Diene Monomer (EPDM)/Styrene Butadiene Rubber (SBR) using a two-roll milling machine by Vishvanathperumal et al.[9] It was reported that the incorporation of sulfur as a cross-linking agent exhibited better mechanical properties and cured systems than others. Hernandez et al.[10] investigated the thermal aging of three different elastomers (Nitrile-Butadiene Rubber (NBR), Chloroprene Rubber (CR), and NR). It was discovered that long-term thermal aging reduced the elongation at breakage while increasing hardness in all elastomers. In addition, there was no improvement in tensile strength for NR, but the tensile strength was decreased for CR and NBR. The different ratios of 4-Poly (Butadiene-Co-Isoprene) (TBIR) (0, 10, and 20) were mixed with a constant ratio of NR/Cis-1, 4-Polybutadiene Rubber (45/55) composite. The incorporation of unfilled or filled compounds of carbon black (CB) N330 (50, 55, and 60 phr) blends with NR/Cis-1, 4-Polybutadiene Rubber/TBIR Compounds by Wang et al.[11] It was reported that the combination of maximum filled NR/Cis-1, 4-Polybutadiene Rubber/TBIR increased the network structure of the polymer with better dynamic performance and good interfacial vulcanization over other combinations.
The Influence of Key Design Parameters on the Cyclic Axial Behavior of Innovative Replaceable Buckling Restrained Fuses (RBRFs)
Published in Journal of Earthquake Engineering, 2019
Yusak Oktavianus, Helen Margaret Goldsworthy, Emad Gad, Saman Fernando
Figure 3 shows the process of assembling the fuse. Prior to filling the gap with epoxy, self-adhesive neoprene rubber with a thickness of 1.5 mm was used to wrap the fuse to provide a debonding layer as shown in Fig. 2b. The purpose of having the debonding layer is to reduce the ratio of maximum compressive force to maximum tensile force (). Tsai et al. [2014] suggested that the thickness of the debonding layer should be 2 mm, and this has been confirmed by Oktavianus et al. [2015b]. However, the available thicknesses of self-adhesive neoprene rubber in Melbourne are 1.5 mm, 3 mm, 4.5 mm, and 6 mm. Therefore, a thickness of 1.5 mm was adopted in this research. The neoprene, which is polychloroprene, was used instead of chloroprene since neoprene is easier to find in the market and the material composition of these compounds is very similar.
Overview of biological mechanisms of human carcinogens
Published in Journal of Toxicology and Environmental Health, Part B, 2019
Nicholas Birkett, Mustafa Al-Zoughool, Michael Bird, Robert A. Baan, Jan Zielinski, Daniel Krewski
Butadiene is employed primarily in the production of synthetic rubbers and polymers, which are used in a wide variety of industrial and consumer products. Butadiene is also utilized as an intermediate in the production of chloroprene and other chemicals. The highest exposures to butadiene occur in occupational settings in several industrial activities, such as petroleum refining and related operations, production of C4 fractions containing butadiene, production and distribution of gasoline, production of purified butadiene monomer, and manufacture of rubber and plastic products, such as tires, hoses and a variety of molded objects. There is some low-level airborne exposure of the general public. 1,3-Butadiene induces cancer of the hematolymphatic system.