{"id":174,"date":"2007-01-25T11:41:01","date_gmt":"2007-01-25T11:41:01","guid":{"rendered":"http:\/\/www.jpyro.com\/wp\/?p=174"},"modified":"2007-01-25T11:41:01","modified_gmt":"2007-01-25T11:41:01","slug":"effect-of-ultrasound-on-single-base-propellants-for-pyrotechnic-purposes","status":"publish","type":"post","link":"https:\/\/www.jpyro.co.uk\/?p=174","title":{"rendered":"Effect of Ultrasound on Single-Base Propellants for Pyrotechnic Purposes"},"content":{"rendered":"<p align=\"left\"><strong>Valentin Grozev, Radi Ganev, Ivan Glavchev<\/strong><\/p>\n<p align=\"left\"><strong>ABSTRACT:<\/strong>&nbsp; Investigations were conducted on the effect of ultrasound on single-base propellants. Changes in the average viscosimetric molecular weight of nitrocellulose in the solutions of propellants in acetone and in a mixture of ethyl alcoholdiethyl ether were studied. It has been established that, for at least 60 minutes, the molecular weight decreases exponentially. On-going degradation processes and the effect of cavitation during treatment of the propellants with ultrasound were analyzed. The change in nitrogen content and the heat released were also measured. The absorption coefficients and the sound velocities of the propellants were determined. Using these parameters, the dynamic modulus of elasticity was calculated. The results obtained are used in the processing of propellants for pyrotechnic purposes.<\/p>\n<p align=\"left\"><strong>Keywords:<\/strong> single-base, propellants, ultrasound, degradation<\/p>\n<hr \/>\n<p><em><strong>Ref:<\/strong> JPyro, Issue 16, 2002, pp53-58<br \/> (J16_53)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Valentin Grozev, Radi Ganev, Ivan Glavchev ABSTRACT:&nbsp; Investigations were conducted on the effect of ultrasound on single-base propellants. Changes in the average viscosimetric molecular weight of nitrocellulose in the solutions of propellants in acetone and in a mixture of ethyl alcoholdiethyl ether were studied. It has been established that, for at least 60 minutes, the &hellip;<br \/><a href=\"https:\/\/www.jpyro.co.uk\/?p=174\" class=\"more-link pen_button pen_element_default pen_icon_arrow_double\">Continue reading <span class=\"screen-reader-text\">Effect of Ultrasound on Single-Base Propellants for Pyrotechnic Purposes<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2,29],"tags":[],"_links":{"self":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/174"}],"collection":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=174"}],"version-history":[{"count":0,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/174\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=174"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=174"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=174"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}