caa a22 4500 467952396 CHVBK 20180322200726.0 cr unu---uuuuu 170328e19861101xx s 000 0 eng 10.1007/BF02431631 doi (NATIONALLICENCE)springer-10.1007/BF02431631 (NATIONALLICENCE)springer-10.1007/BF00553448 Bhowmick Anil Rubber Technology Centre, Indian Institute of Technology, 721302, Kharagpur, India aut Tear strength of elastomers over a range of rates, temperatures and crosslinking: tearing energy spectra [Elektronische Daten] [Anil Bhowmick] Measurement of tear strength of polyphosphazene (PNF), polychloroprene (CR) and styrenebutadiene rubber (SBR) has been carried out over a wide range of rates, temperatures and crosslinking. Data on strength of PNF have been found to be superimposable on a single master curve with the help of the WLF shift factor, indicating that enhancement of strength at high rates or low temperatures arises from simple viscoelastic loss mechanisms. The master curve may be termed as tearing energy spectra for a particular crosslinking density. Master curves at different elastic modulii are not superimposable. Strength of PNF is also much lower than that of SBR at a similar degree of crosslinking. This shows that mass per chain atom, which was important for predicting threshold strength is equally important under non-equilibrium conditions. Tearing energy spectra of filled SBR has also been obtained with the help of restricted tearing tests. Strength values obtained at various temperatures and rates for CR are, however, not superimposable on a master curve even with the help of special tests such as: (a) by partial swelling, (b) by doubling the curing agents, or (c) by peeling two layers apart. This anomaly is attributed to strain-induced crystallization of neoprene rubber on a molecular level. Chapman and Hall Ltd., 1986 Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 3927-3932 0022-2461 21:11<3927 1986 21 10853 https://doi.org/10.1007/BF02431631 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02431631 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bhowmick Anil Rubber Technology Centre, Indian Institute of Technology, 721302, Kharagpur, India aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 3927-3932 0022-2461 21:11<3927 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553448 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer