Zobrazeno 1 - 10
of 98
pro vyhledávání: '"G.M. Lukovkin"'
Autor:
Ye.A. Shmatok, Olga V. Arzhakova, A. L. Volynskii, Ye.M. Ukolova, N.F. Bakeyev, G.M. Lukovkin, L.M. Yarsheva
Publikováno v:
Polymer Science U.S.S.R.. 33:917-923
During strain of polymers two types of crazing are observed with a number of fundamental differences— classical and delocalized. It is assumed that the development of classical crazing is associated with the non-ideality of the homogeneous structur
Publikováno v:
Polymer Science U.S.S.R.. 26:2452-2458
Elongation of glassy PETP in an adsorption-active medium was examined from the point of view of the Griffith-Rebinder theory. It was shown theoretically that the number of microcracks formed shows a complex dependence on thickness and the rate of str
Publikováno v:
Polymer Science U.S.S.R.. 30:2072-2077
Swelling at 50°C with subsequent cooling to room temperature has been used to obtain specimens of vulcanized natural rubber containing up to 200% of n-octadecane. It has been observed that, with time, a process of phase separation occurs in such spe
Publikováno v:
Polymer Science U.S.S.R.. 29:224-227
An equation describing the kinetics of accumulation of crazes as a function of time or deformation under creep conditions is proposed. The equation is based on the assumption of the threshold character of craze appearance and the presence of a craze
Publikováno v:
Polymer Science U.S.S.R.. 24:2706-2713
The influence of liquid adsorption-active media on mechanical behaviour and nature of crazing of polyethylene terephthalate (PETP) has been studied. It was found that with an increase in the number of crazes (being the localized centres of plastic de
Publikováno v:
Polymer Science U.S.S.R.. 24:2464-2472
A study has been made of the cold drawing of amorphous polyethyleneterephthalate under strain in an adsorption-active medium as a function of the rate of deformation. A relationship has been found between mechanical behaviour of the polymer under a c
Publikováno v:
European Polymer Journal. 10:393-399
Six copolymers of 4-vinylpyridine and 4-vinyl-N-phenacyloximepyridinium bromide (PPyOx-12, 23, 40, 50, 60 and 72 per cent) were prepared from poly-4-vinylpyridine partially quaternized by phenacylbromide (PPyKt) and hydroxylamine. The potentiometric
Publikováno v:
Polymer Science U.S.S.R.. 19:910-919
A model for the cold drawing of a polymer is described as a non-uniform deformation which takes place in the presence of concentrations of stresses. An excess of free volume is assumed in the stress concentrator and also a local orientation of the ma
Autor:
L.Yu. Pazukhina, G.M. Lukovkin, P.V. Kozlov, N.F. Bakeyev, L. M. Yarysheva, A. L. Volynskii, Victor A. Kabanov
Publikováno v:
Polymer Science U.S.S.R.. 28:211-217
A study of the stretching of glasslike polyethylene terephtha late (PETP)_in an adsorption-active medium has been made in the light of Griffiths-Rebinder theory. It is shown on the basis of theoretical considerations that the number of incipient micr
Publikováno v:
Polymer Science U.S.S.R.. 30:2220-2227
The process of migration of a crystalline low molecular weight hydrocarbon from the volume of NR vulcanizates has been studied. It is assumed that the mechanism of this phenomenon consists in the melting of the crystalline phase of the low molecular