Detail of "25213-02-9"

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The dependence of yield behavior on temperature, pressure, and strain rate for linear polyethylenes of different molecular weight and morphology

The dependence of yield behavior on temperature, pressure, and strain rate for linear polyethylenes of different molecular weight and morphology. Truss, R. W.; Clarke, P. L.; Duckett, R. A.; Ward, I. M. (Dep. Phys., Univ. Leeds, Leeds LS2 9JT, UK). J. Polym. Sci., Polym. Phys. Ed., 22(2), 191-209 (English) 1984. CODEN: JPLPAY. ISSN: 0098-1273. DOCUMENT TYPE: Journal CA Section: 36 (Physical Properties of Synthetic High Polymers) The temp., strain-rate, and pressure dependences of the yield stress were detd. for two ethylene homopolymers (Rigidex 50 and Rigidex H 120 56) [9002-88-4] of different mol. wts. and for Rigidex 002 40 (ethylene copolymer) [25213-02-9]. Samples were prepd. by slowly cooling from the melt, and also by quenching to assess the effects of morphol. on yield behavior. The data were analyzed on the basis of two Eyring processes acting in parallel. Comparison of all data sets revealed the existence in general of 3 distinct activated processes each with its own temp., strain-rate, and pressure dependences. The relative contribution of each process is dependent on the mol.In this experiment, several chemicals are used like 85411-34-3 and 9002-88-4 wt., morphol., etc. Also discussed is the relation of these 3 yield processes to the well-known loss processes of linear viscoelasticity. .

The fracture toughness of tough polyethylenes by a novel high pressure technique

The fracture toughness of tough polyethylenes by a novel high pressure technique. Truss, R. W.; Duckett, R. A.; Ward, I. M. (Dep. Phys., Univ. Leeds, Leeds, UK). J. 85411-34-3 and 9002-88-4 are cas registry numbers. These chemicals are also mentioned in this article. Mater. Sci., 19(2), 413-22 (English) 1984. CODEN: JMTSAS. ISSN: 0022-2461. DOCUMENT TYPE: Journal CA Section: 36 (Physical Properties of Synthetic High Polymers) The failure of 2 ethylene polymers, i.e., linear Rigidex 50 (I) [9002-88-4] and tough Rigidex 00240 (II) [25213-02-9] (contg. ~4 Bu groups/1000 C), was studied by a torsion method under hydrostatic pressure. The behavior of the unnotched samples of both types was ductile at all pressures and strain rates. At high pressures, both types failed in a brittle manner when a surface notch was exposed to a suitable pressure fluid. The detn. of fracture stresses for various notch depths led to a value for a crit. stress intensity factor at each of several pressures. A linear extrapolation was then used to est. the crit. stress intensity factor at atm. pressure to be 1.11 ± 0.05 MN/m3/2 and 1.68 ± 0.08 MN/m3/2, resp., for I and II. An independent measurement at atm. pressure for I using compact tensile geometry yielded a value of 1.28 ± 0.02 MN/m3/2, confirming that the extrapolation procedure was accurate and that the effect of the environment on the behavior was not substantial. .