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Authors
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Banerjee, S. S. ; Banerjee, S. ; Wießner, S. ; Janke, A. ; Heinrich, G. ; Das, A.
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Title
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A new route to highly stretchable and soft inorganic-organic hybrid elastomers using polydimethylsiloxane as crosslinker of epoxidized natural rubber
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Date
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01.11.2021
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Number
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59690
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Abstract
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Sulfur or peroxide crosslinking is the most common and conventional method to develop elastomeric materials. A new approach to crosslink epoxidized natural rubber (ENR) by aminopropyl terminated polydimethylsiloxane (AT-PDMS) is described, intending to develop a new kind of hybrid organic–inorganic elastomers. The curing reaction is accelerated by using hydroquinone as a catalyst. The formation of the hybrid structure is evident from the appearance of two glass transition temperatures, at -1 and -120 °C, for the ENR and PDMS phases, respectively. The curing reaction is found to be of first order with respect to amine concentration with the estimated activation energy of ˜62 kJ mol-1. Comparing the mechanical properties to a typical ENR-sulfur system leads to the conclusion that the ENR/AT-PDMS hybrid structure is highly stretchable and soft, as demonstrated by its relatively higher strain at failure (up to ˜630%), and lower hardness and modulus values. The higher stretchability and soft nature of the material are achieved by introducing flexible PDMS chains during the curing process resulting to a hybrid elastomer networks. This kind of soft but robust materials can find several applications in diverse fields, such as soft robotics, flexible, and stretchable electronics.
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Publisher
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Macromolecular Materials and Engineering
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Wikidata
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Q112168885
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Citation
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Macromolecular Materials and Engineering 306 (2021) 2100380
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DOI
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https://doi.org/10.1002/MAME.202100380
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Tags
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