caa a22 4500 46794914X CHVBK 20180322200725.0 cr unu---uuuuu 170328e19861001xx s 000 0 eng 10.1007/BF02403022 doi (NATIONALLICENCE)springer-10.1007/BF02403022 (NATIONALLICENCE)springer-10.1007/BF00553820 A novel method to measure the elastic modulus of polymers as a function of tensile deformation [Elektronische Daten] [S. Saimoto, D. Thomas] A method to measure the elastic modulus of semicrystalline polyethylene during an instantaneous strain rate change is described. The elimination of machine transients during the strain rate change permits the observation of the stress reduction which must occur to maintain the abrupt change in non-elastic strain rate. This change can be implemented fast enough to precisely determine the incremental changes in stress and strain before relaxation processes take place. The results show that at 23.2° C the unrelaxed modulus decreases with strain whereas at 51° C it is constant. Furthermore, at room temperature the strain dependence of modulus change decreases with decrease in the degree of crystallinity. Such observations are in accordance with the thermal-mechanical data which indicate that both crystalline and viscous flow takes place near ambient but at elevated temperatures or slower strain rates, flow primarily occurs in the amorphous regions. Chapman and Hall Ltd, 1986 Saimoto S. Department of Metallurgical Engineering, Queen's University, K7L 3N6, Kingston, Ontario, Canada aut Thomas D. Department of Metallurgical Engineering, Queen's University, K7L 3N6, Kingston, Ontario, Canada aut Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3686-3690 0022-2461 21:10<3686 1986 21 10853 https://doi.org/10.1007/BF02403022 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02403022 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Saimoto S. Department of Metallurgical Engineering, Queen's University, K7L 3N6, Kingston, Ontario, Canada aut NATIONALLICENCE 700 1- Thomas D. Department of Metallurgical Engineering, Queen's University, K7L 3N6, Kingston, Ontario, Canada aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/10(1986-10-01), 3686-3690 0022-2461 21:10<3686 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553820 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