Zobrazeno 1 - 10
of 147
pro vyhledávání: '"R.N. Haward"'
Publikováno v:
Polymer. 45:3115-3123
Three high density polythylenes with widely differing molecular weights have been subjected to a fast fracture process and studied by scanning electron micrography. Two polymers in the low to medium molecular weight range show evidence of substantial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f783bbffbec8ef3aa641dcf62f1c6a7e
https://doi.org/10.1016/j.polymer.2004.02.036
https://doi.org/10.1016/j.polymer.2004.02.036
Autor:
R.N. Haward, Stuart Hillmansen
Publikováno v:
Polymer. 42:9301-9312
A series of true stress–strain curves measured in tension, published by Hiss and Strobl [Deformation, yield and fracture of polymers (1997) 439], have been modelled using a Gaussian equation to represent strain hardening. An empirically-based const
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dd6cf4872e8836204620609758f7026
https://doi.org/10.1016/s0032-3861(01)00447-5
https://doi.org/10.1016/s0032-3861(01)00447-5
Publikováno v:
Polymer Engineering & Science. 40:481-489
Conventional tensile testing applied to high density polyethylene can lead to erroneous impressions of the tensile response of the material due to a local reduction in cross section of the sample. Several workers have developed novel tensile testing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37903aeaf507e69a887aa808ab28d852
https://doi.org/10.1002/pen.11180
https://doi.org/10.1002/pen.11180
Autor:
R.N. Haward
Publikováno v:
Polymer. 40:5821-5832
A conventional rubber elasticity equation based on the inverse Langevin function, combined with a yield stress (Y0) has been used for the purpose of studying published tensile stress–strain curves for thermoplastic elastomers. In order to simplify
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6902475024ed6bc89ceec11b3077a3bf
https://doi.org/10.1016/s0032-3861(99)00124-x
https://doi.org/10.1016/s0032-3861(99)00124-x
Autor:
R.N. Haward
Since the publication of the first edition of The Physics of Glassy Polymers there have been substantial developments in both the theory and application of polymer physics, and many new materials have been introduced. Furthermore, in this large and g
Autor:
R.N. Haward
Publikováno v:
Thermochimica Acta. 247:87-109
The deformation of a plastic material is normally accompanied by a change in temperature, which depends on the character of the process taking place. Low stresses cause small reversible strains with minimal time factors. In this regime there is gener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::802d2b8d0074dbd2587be0a78dc76ef5
https://doi.org/10.1016/0040-6031(94)80115-0
https://doi.org/10.1016/0040-6031(94)80115-0
Autor:
R.N. Haward
Publikováno v:
Polymer. 35:3858-3862
Some problems in the measurement of stress-strain curves for thermoplastics are considered and the importance of measuring true stress-strain curves is emphasized. However, an increasing number of suitable curves have now been published of which the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95318e46c2f9dbad6830ce657f4f64cb
https://doi.org/10.1016/0032-3861(94)90268-2
https://doi.org/10.1016/0032-3861(94)90268-2
Publikováno v:
Polymer. 33:5309-5314
Blocked copolymers from aliphatic diacids and diol-terminated aromatic polyester blocks have been prepared and studied. The preparations of such block copolymers with good molecular weights proved difficult, but a final carbonation reaction enabled t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::974e9dd4fec39848be91f35d5acf722d
https://doi.org/10.1016/0032-3861(92)90817-g
https://doi.org/10.1016/0032-3861(92)90817-g
Publikováno v:
Polymer. 31:949-953
Catalysts have been prepared by the reduction of vanadium( iv ) chloride with alkylgalliums and used to polymerize ethene at various temperatures and with various cocatalytic components. By comparison of the results obtained with those obtained from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebd5308758ffd96349e3fac61fd32b19
https://doi.org/10.1016/0032-3861(90)90062-4
https://doi.org/10.1016/0032-3861(90)90062-4
Some crystalline thermoplastics which show high resistance to slow tearing are susceptible to brittle rapid crack propagation. These polymers may also lose much of their impact fracture resistance with increasing impact speed. The thermal decohesion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5405a7625aad0c1164cd400ab1c50e3e
https://doi.org/10.1016/s1566-1369(00)80029-1
https://doi.org/10.1016/s1566-1369(00)80029-1