Vulcanization kinetics and mechanical properties of organically modified nanoclay incorporated natural and chlorobutyl rubber nanocomposites. (July 2019)

• Record Type: Journal Article
• Authors: Zachariah, Ajesh K.; Chandra, Arup Kumar; Mohammed, P.K.; Thomas, Sabu
• Is Part Of: Polymer testing. Volume 76(2019)
• Page Start: 154
• Page End: 165
• Publication Date: 2019-07
• Subjects: Natural rubber -- Chlorobutyl rubber -- Nanocomposites -- Vulcanization kinetics -- Mechanical modeling; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2019.02.003
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: The curing kinetics, vulcanizate properties, mechanical reinforcement and chemical interactions of organically modified nanoclay filled natural rubber (NR) and chlorobutyl (CIIR) rubbers have been studied. From the vulcanization studies, it is observed that nanoclays are more intercalated in NR matrix rather than CIIR matrix. To understand the exact mechanism operating in the vulcanization behavior of NR and CIIR, autocatalytic model was applied. The vulcanization kinetic studies revealed that the nanoclay distribution at high temperature (190 °C) in CIIR matrix is somewhat intercalated in nature. Highly pronounced reversion behavior was observed in NR matrix. The mechanical reinforcement of vulcanizates was examined using the change in modulus values at 100% and 300% elongation. The mechanical properties were modeled using different kind of models such as Guth-Smallwood, Halpin-Tsai, modified Halpin-Tsai and Mori-Tanaka models. Finally, the dispersion of nanoclay platelets in CIIR and NR matrix was confirmed by the phase images obtained from AFM technique. Highlights: The article describes about the curing kinetics of NR and CIIR nanocomposites. This is an exclusive effort to understand the curing studies and mechanical modeling behavior of CIIR nanocomposites. Here, the mechanical behavior and cure behavior of rubber nanocomposites were modeled using phenomenological models. Effect of temperature on the cure behavior of CIIR and NR nanocomposites were analyzed. Comparative studies of cure behavior of CIIR and NR nanocomposites were done for the first time.