structural analysis of sulfur in natural rubber using
Structural analysis of sulfur in natural rubber using X
Structural analysis of sulfur in natural rubber using X-ray absorption near-edge spectroscopy Wanwisa Pattanasiriwisawa,a* Jaruwan Siritapetawee,b Orasa Patarapaiboolchaic and Wantana Klysubuna aNational Synchrotron Research Center, 111 University Avenue, Muang, Nakhon Ratchasima
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Structural analysis of sulfur in natural rubber using X
X-ray absorption near-edge spectroscopy (XANES) has been applied to natural rubber in order to study the local environment of sulfur atoms in sulfur crosslinking structures introduced in the vulcanization process. Different types of chemical accelerators in conventional, semi-efficient and efficient vulcanization systems were investigated.
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Structural analysis of sulfur in natural rubber using X
The sulfur crosslinking films from Natural Rubber (NR), Carboxylated Stryrene Butadiene Rubber (XSBR) latices, and their blends have been investigated using X-ray absorption near-edge structure ...
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SULFUR VULCANIZATION OF NATURAL RUBBER FOR BENZOTHIAZOLE
sulfur vulcanization of natural rubber for benzothiazole accelerated formulations: from reaction mechanisms to a rational kinetic model prasenjeet ghosh,+ santhoji katare,priyan patkar james m. caruthers,* venkat venkatasubramanian school of chemical engineering,purdue university west lafayette, in 47906-1283 kenneth a. walker chemical products business unit,caterpillar,inc.
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Solid‐state carbon‐13 NMR Studies of vulcanized elastomers
It is found that vulcanizates containing smaller amounts of sulfur (1 and 3%) show insignificant changes in the NMR spectra for curing times of 30 and 90 min. Structural modifications in rubbers cured with 10% sulfur continuously increase with the increasing curing time up to 120 min, indicating a significant loss in double bonds in the later stages of the reaction.
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Oxidative Degradation Monitoring of Natural Rubber Using S
In this work, we present the results of sulfur crosslinking and degradation in natural rubber (NR) studied by X-ray absorption near-edge structure spectroscopy (XANES).
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Structural characterization of vulcanizates. Part I
The disparity in the values of 1/2M * c,chem obtained by the two methods reflects the scission of natural rubber main chains during the vulcanization process, the extent of such scission being found to increase with increasing cure time.
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Mechanical properties and cross-linking structure of cross
As shown in Figure 6, the quaternary carbon linked to sulfur at a cross-linking junction may maintain the accordion structure of natural rubber, which is a main factor in the rubber elasticity. 17 ...
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Vulcanization - an overview | ScienceDirect Topics
In this chapter, a recent study 13 on the network structure of sulfur cross-linked isoprene rubber (IR) is described for natural rubber (NR), in which a new vulcanization mechanism is included. The mechanism was based on the small-angle neutron scattering (SANS) measurement of isoprene rubber vulcanizates, which was found to be useful in clarifying the chemical reaction mechanism.
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Vulcanization kinetics and reversion behavior of natural
Crosslink structure is basically defined by the degree of crosslinking (number of crosslinks per unit volume) and the polysulfidity (the length of sulfur crosslinks) of crosslinks in the network structure of rubber compounds which is mostly dominated by the sulfur content and sulfur/accelerator (S/A) ratio in the curing system formulation.
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Structural analysis of sulfur in natural rubber using X
Structural analysis of sulfur in natural rubber using X-ray absorption near-edge spectroscopy Wanwisa Pattanasiriwisawa,a* Jaruwan Siritapetawee,b Orasa Patarapaiboolchaic and Wantana Klysubuna aNational Synchrotron Research Center, 111 University Avenue, Muang, Nakhon Ratchasima
Send Inquiry
Structural analysis of sulfur in natural rubber using X
The sulfur crosslinking films from Natural Rubber (NR), Carboxylated Stryrene Butadiene Rubber (XSBR) latices, and their blends have been investigated using X-ray absorption near-edge structure
Send Inquiry
Structural analysis of sulfur in natural rubber using X
X-ray absorption near-edge spectroscopy (XANES) has been applied to natural rubber in order to study the local environment of sulfur atoms in sulfur crosslinking structures introduced in the vulcanization process. Different types of chemical accelerators in conventional, semi-efficient and efficient vulcanization systems were investigated.
Send Inquiry
Mechanical properties and cross-linking structure of cross
As shown in Figure 6, the quaternary carbon linked to sulfur at a cross-linking junction may maintain the accordion structure of natural rubber, which is a main factor in the rubber elasticity. 17
Send Inquiry
SULFUR VULCANIZATION OF NATURAL RUBBER FOR BENZOTHIAZOLE
The chemistry of accelerated sulfur vulcanization is reviewed and a fundamental kinetic model for the vulcaniza-tion process is developed. The vulcanization of natural rubber by the benzothiazolesulfenamide class of accelerators is studied, where 2-(morpholinothio) benzothiazole (MBS) has been chosen as the representative accelerator. The reaction
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Oxidative Degradation Monitoring of Natural Rubber Using S
In this work, we present the results of sulfur crosslinking and degradation in natural rubber (NR) studied by X-ray absorption near-edge structure spectroscopy (XANES).
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Forensic Analysis of Tire Rubbers Based on Their Sulfur
X-ray absorption near-edge spectroscopy (XANES) has been applied to natural rubber in order to study the local environment of sulfur atoms in sulfur crosslinking structures introduced in the
Send Inquiry
Vulcanization - an overview | ScienceDirect Topics
In this chapter, a recent study 13 on the network structure of sulfur cross-linked isoprene rubber (IR) is described for natural rubber (NR), in which a new vulcanization mechanism is included. The mechanism was based on the small-angle neutron scattering (SANS) measurement of isoprene rubber vulcanizates, which was found to be useful in clarifying the chemical reaction mechanism.
Send Inquiry