Zobrazeno 1 - 10
of 41
pro vyhledávání: '"N.G. Matveyeva"'
Publikováno v:
Polymer Science U.S.S.R.. 17:1820-1826
A study was made of the crystalline structure of α, μ-bis-(4-methacryloxyethyl carbamate toluylene-2-carbamic) esters of oligoethylene glycols of different molecular weights and crosslinked polymers therefrom. The first members of oligomer homologu
Publikováno v:
Polymer Science U.S.S.R.. 18:1339-1345
A study was made of molecular mobility in crosslinked polymers obtained by hardening of dimethacrylic esters of oligotetramethylene glycols of different molecular weights. Several relaxation transitions were detected by dynamic mechanical methods whi
Publikováno v:
Polymer Science U.S.S.R.. 19:495-501
A study was made of the effect of the order of adding propylene oxide (PO) and a catalyst on process mechanism, molecular weight and functionality of oligomers formed by co-oligomerization of tetrahydrofuran with PO by the action of SbCl5 in the pres
Publikováno v:
Polymer Science U.S.S.R.. 20:1218-1224
Small and wide angle X-ray diffraction analysis, but also electron microscopy, have been used to study the structure and morphology of bis-4-methacryloxy-ethylcarbamy1-2-toluylene carbamates of ethylene glycol having various molecular weights, and al
Publikováno v:
Polymer Science U.S.S.R.. 20:2458-2464
Low temperature transitions in crosslinked polymers of α,ω-bis-(4-methacryloxyethylcarbamatotoluylene-2-carbamic) esters of oligo(ethylene glycols) of different molecular weight (6×102−7×103), have been studied by the radiothermoluminescence me
Publikováno v:
Polymer Science U.S.S.R.. 18:1516-1521
The problem of how the concentration of the chain transfer agent, the catalyst and the reaction time influence the chlorine content in oligomers prepared by cationic copolymerization of THF with propylene oxide, in presence of methacrylic anhydride h
Publikováno v:
Polymer Science U.S.S.R.. 16:2128-2134
The glass transition temperature T g was determined on the basis of the thermomechanical curves for amorphous network polymers based on oligo(oxyethylene-urethane methacrylates) of different molecular weight. It was found that T g is proportional to
Publikováno v:
Polymer Science U.S.S.R.. 16:680-688
The radical polymerization of α,ω-bis-4-methacryloxycarbamatotoluylene (bis-MOCTC) ethers of oligoethylene glycols having various molecular weights (mol. wt.), i.e. from 660 to 6920, yielded crosslinked polymers with differing crosslinking densitie
Publikováno v:
Polymer Science U.S.S.R.. 14:2648-2653
fact tha t with an increase m the degree of drying, the water absorbed is characterized by a stronger H bond with cellulose molecules. As K ~ is the ratio of absorption coefficients for bond-stretching and deformation vibrations of the OH bond of wat
Publikováno v:
Polymer Science U.S.S.R.. 15:814-822
THE synthesis of high polymers from reactive oligomers has become widespread in recent years. From the technological point of view the most interesting are polymerizable oligomers with unsaturated end groups, which are convertible without elimination