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Characteristics of polyurethane elastomer blends with poly (acrylonitrile - co - butadiene) rubber as an encapsulant for underwater sonar devices / H. G. Im in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7336–7342 Titre : Characteristics of polyurethane elastomer blends with poly (acrylonitrile - co - butadiene) rubber as an encapsulant for underwater sonar devices Type de document : texte imprimé Auteurs : H. G. Im, Auteur ; K. R. Ka, Auteur ; C. K. Kim, Auteur Année de publication : 2010 Article en page(s) : pp. 7336–7342 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Thermoplastic  Elastomer Résumé : Thermoplastic polyurethane elastomer (TPU) is widely used as an encapsulant in undersea sonar devices. Since sonar encapsulants are filled with a paraffin oil to prevent the ingress of seawater into the transducer, encapsulant materials possessing a lower swelling ratio for seawater and paraffin oil, along with better mechanical strength than TPU after impregnation, are desirable. To fabricate polymeric materials for application in sonar encapsulants, TPUs prepared with poly(tetramethylene glycol) (PTMG) and methyldiphenyldiisocyanate (MDI) were blended with poly(acrylonitrile-co-butadiene) rubber (NBR) containing various amounts of acrylonitrile (AN). The swelling ratios of the TPU/NBR blends in seawater were all lower than that of TPU, regardless of the AN content of the NBR, and the swelling ratio gradually decreased with increasing AN content of the NBR. The TPU blend with NBR containing 43 wt % AN exhibited a lower swelling ratio than TPU in paraffin oil. In addition, the TPU/NBR43 blend exhibited enhanced mechanical strength, as compared to TPU after being impregnated with seawater and paraffin oil. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100975n [article] Characteristics of polyurethane elastomer blends with poly (acrylonitrile - co - butadiene) rubber as an encapsulant for underwater sonar devices [texte imprimé] / H. G. Im, Auteur ; K. R. Ka, Auteur ; C. K. Kim, Auteur . - 2010 . - pp. 7336–7342. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7336–7342 Mots-clés : Thermoplastic  Elastomer Résumé : Thermoplastic polyurethane elastomer (TPU) is widely used as an encapsulant in undersea sonar devices. Since sonar encapsulants are filled with a paraffin oil to prevent the ingress of seawater into the transducer, encapsulant materials possessing a lower swelling ratio for seawater and paraffin oil, along with better mechanical strength than TPU after impregnation, are desirable. To fabricate polymeric materials for application in sonar encapsulants, TPUs prepared with poly(tetramethylene glycol) (PTMG) and methyldiphenyldiisocyanate (MDI) were blended with poly(acrylonitrile-co-butadiene) rubber (NBR) containing various amounts of acrylonitrile (AN). The swelling ratios of the TPU/NBR blends in seawater were all lower than that of TPU, regardless of the AN content of the NBR, and the swelling ratio gradually decreased with increasing AN content of the NBR. The TPU blend with NBR containing 43 wt % AN exhibited a lower swelling ratio than TPU in paraffin oil. In addition, the TPU/NBR43 blend exhibited enhanced mechanical strength, as compared to TPU after being impregnated with seawater and paraffin oil. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100975n