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http://dx.doi.org/10.9713/kcer.2015.53.3.282

Preparation of Azidated Polybutadiene(Az-PBD)/Ethylene-Vinyl Acetate Copolymer(EVA) Blends for the Application of Energetic Thermoplastic Elastomer  

Yoon, Sang Won (Department of Fusion Chemical Engineering, Hanyang University)
Choi, Myung Chan (Department of Fusion Chemical Engineering, Hanyang University)
Chang, Young-Wook (Department of Fusion Chemical Engineering, Hanyang University)
Noh, Si-Tae (Department of Fusion Chemical Engineering, Hanyang University)
Kwon, Soon Kil (Agency for Defense Development)
Publication Information
Korean Chemical Engineering Research / v.53, no.3, 2015 , pp. 282-288 More about this Journal
Abstract
A new energetic thermoplastic elastomer based on the azidated polybutadiene(Az-PBD)/ethylene vinyl acetate copolymer (EVA) blends was prepared, and structure and properties of the blends were invetigated by SEM, DSC, DMA, tensile testing and combustion test. The Az-PBD was synthesized via a two-step process involving the addition reaction of commercially available 1,2-PBD with $Br_2$ and subsequent nucleophilic substitution reaction of the brominated PBD with $NaN_3$. EVA/Az-PBD with 90/10, 80/20, 70/30 (wt/wt) was prepared by a solution blending. SEM, DSC, and DMA results revealed that the blends are partially compatible and Az-PBD is dispersed in continuous EVA matrix. Tensile test showed that modulus and tension set increased while elongation-at-break of the blends decreased with increasing Az-PBD content in the blends, but all the blends showed a elongation at break as high as 700% and a tension set of less than 5%, indicating that the blends are typically elastomeric. Combustion test showed that, with increasing Az-PBD content in the blend, higher energy can be released.
Keywords
Energetic Thermoplastic Elastomer (ETPE); Azidated Polybutadiene (Az-PBD); Ethylene-vinyl Acetate (EVA); Blend;
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Times Cited By KSCI : 2  (Citation Analysis)
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