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Study of phase separation in the system polyacrylamide plus water plus methanol by spectroturbidimetric titration 用光谱比浊滴定法研究聚丙烯酰胺+水+甲醇体系的相分离
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90155-J
L.G. Lebedeva, O.V. Klenina, N.G. Khlebtsov, V.I. Klenin
{"title":"Study of phase separation in the system polyacrylamide plus water plus methanol by spectroturbidimetric titration","authors":"L.G. Lebedeva,&nbsp;O.V. Klenina,&nbsp;N.G. Khlebtsov,&nbsp;V.I. Klenin","doi":"10.1016/0032-3950(91)90155-J","DOIUrl":"10.1016/0032-3950(91)90155-J","url":null,"abstract":"<div><p>Phase separation has been studied in the system polyacrylamide + water + methanol at low polymer concentrations to determine the conditions of spectroturbidimetric titration for obtaining the precipitation curve of the polymer. An equation of solubility necessary for inversion of the precipitation curve to the MMD function has been defined.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 5","pages":"Pages 896-901"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90155-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76313204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relation between the mechanical properties of organosilicon composites cured by the hydrosilylation reaction, with the parameters of vulcanizates 硅氢化反应固化有机硅复合材料的力学性能与硫化剂参数的关系
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90174-O
S.R. Nanushyan, A.B. Polees, T.P. Gribanova
{"title":"Relation between the mechanical properties of organosilicon composites cured by the hydrosilylation reaction, with the parameters of vulcanizates","authors":"S.R. Nanushyan,&nbsp;A.B. Polees,&nbsp;T.P. Gribanova","doi":"10.1016/0032-3950(91)90174-O","DOIUrl":"10.1016/0032-3950(91)90174-O","url":null,"abstract":"<div><p>The effects of various factors [molecular mass (MM) of a vinyl-containing polysiloxane, regime of thermal treatment, relative amounts of ingredients] on the effective density of the vulcanized network and break resistance of polymer-oligomer composites cured by the hydrosilylation reaction were investigated. Parameter <em>A</em> characterizing the degree of nonaffinity of the vulcanized network was determined by comparing the MM values of macromolecular segments between two crosslink points of the network as determined by various methods. The character of the effect of the above named factors on the changes in parameter <em>A</em> is identical. At the same time the effective density of the vulcanized network ambiguously affects the strength of the vulcanizates. The observed effects are connected with the formation, in the curing process of the systems studied, of a vulcanized network with heterophase structure, with disylethane and siloxane bonds in the crosslinks.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 5","pages":"Pages 1033-1039"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90174-O","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84073931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radical polymerization in mixed micelles of cationic surface-active monomers in water 阳离子表面活性单体在水中混合胶束中的自由基聚合
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90055-U
V.V. Yegorov, O.B. Ksenofontova
{"title":"Radical polymerization in mixed micelles of cationic surface-active monomers in water","authors":"V.V. Yegorov,&nbsp;O.B. Ksenofontova","doi":"10.1016/0032-3950(91)90055-U","DOIUrl":"10.1016/0032-3950(91)90055-U","url":null,"abstract":"<div><p>The kinetics of radical polymerization was studied in aqueous micellar solutions of cationic surface-active monomers—derivatives of dimethylaminoethyl methacrylate, containing as additives cationic and anionic surface active compounds (SAC), aliphatic alcohols and water-soluble polymers: polyacrylic acid, 2,5-polyionene and polyethylene glycol (PEG). It was found that all these compounds reduce the polymerization rate in primary micelles, and with the addition of the water-soluble polymers, also the maximum conversion of the monomers is lowered. It could be shown that in the case of the polymeric additives, the effects observed are caused by partial replacement of the monomer in the reaction zone, and in the remaining cases, by a reduction of its concentration in the micelle owing to dilution. The latter effect is the more pronounced, the nearer the dimensions of the aliphatic radicals in the monomer are to the additive; this is connected with the transition from heterogeneous to homogeneous dilution and with a possible disruption of “kinetic packing” of molecules in the associates.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 8","pages":"Pages 1665-1670"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90055-U","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88606671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and properties of water-soluble light-sensitive copolyamides 水溶性光敏共聚物的合成与性能研究
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90018-L
A.F. Maslyuk, G.K. Bereznitskii, V.V. Petrova, V.A. Khranovskii, T.S. Khramova, V.A. Kravchuk
{"title":"Synthesis and properties of water-soluble light-sensitive copolyamides","authors":"A.F. Maslyuk,&nbsp;G.K. Bereznitskii,&nbsp;V.V. Petrova,&nbsp;V.A. Khranovskii,&nbsp;T.S. Khramova,&nbsp;V.A. Kravchuk","doi":"10.1016/0032-3950(91)90018-L","DOIUrl":"10.1016/0032-3950(91)90018-L","url":null,"abstract":"<div><p>A series of light-sensitive water-soluble copolyamides with terminal carboxyl, amine, and photoinitiating (benzoin) fragments in the macro-chain are synthesized by polycondensational telomerization in a melt of a mixture of a salt of ethylene diglycol and piperazine + adipic acid and hexamethylenediamine at various benzoin concentrations. It is shown by means of model reactions of the interaction of benzoin with stearic acid and hexamethylenediamine that in the system under study benzoin, as a typical ketoalcohol, reacts competitively with the carboxyl and amine groups of the copolyamide. The change in [η] during synthesis is extremal in character. Moreover, with all the benzoin concentrations studied, i.e. 1–25 mol.%, the maximum [<em>η</em>]<sub>max</sub> for the copolyamide is attained after ∼ 3 h, after which a sharp decrease in the MM of the polymer is observed because of degradation.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 9","pages":"Pages 1816-1821"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90018-L","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82847057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A study of the strength and relaxation properties of compositions based on polyalkanimide 聚酰胺类合成物强度和弛豫性能的研究
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90303-8
A.A. Askadskii, A.V. Samoryadov, N.Ye. Khramenkov, K.A. Bychko, O.V. Kovriga
{"title":"A study of the strength and relaxation properties of compositions based on polyalkanimide","authors":"A.A. Askadskii,&nbsp;A.V. Samoryadov,&nbsp;N.Ye. Khramenkov,&nbsp;K.A. Bychko,&nbsp;O.V. Kovriga","doi":"10.1016/0032-3950(91)90303-8","DOIUrl":"10.1016/0032-3950(91)90303-8","url":null,"abstract":"<div><p>The mechanical relaxational properties of cast materials based on the original and glass-filled polyalkanimide are studied. Temperature regions are observed in which the relaxation process parameters are weakly dependent on temperature, and also in which there is an anomalous decrease in the rate of the relaxation process with rise in temperature on approximating to the softening point. The given relaxation changes are compared with the results of analysis by the DSC method, which provides a means of explaining the anomalous course of the relaxations in terms of recrystallization processes. As a result, the optimum reprocessing conditions are found. The stress relaxation curves are approximated with the aid of new relaxation kernels, based on an analysis of the entropy changes during relaxation. Correlations coefficients close to unity are obtained.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 12","pages":"Pages 2487-2496"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90303-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75906481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetics of the high-temperature oxidation of polydiphenylphenylene oxide 聚二苯基苯基氧化物的高温氧化动力学
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90090-D
I.A. Serenkova, Yu.A. Shlyapnikov
{"title":"Kinetics of the high-temperature oxidation of polydiphenylphenylene oxide","authors":"I.A. Serenkova,&nbsp;Yu.A. Shlyapnikov","doi":"10.1016/0032-3950(91)90090-D","DOIUrl":"10.1016/0032-3950(91)90090-D","url":null,"abstract":"<div><p>The oxidation of poly-2,6-diphenyl-1,4-phenylene oxide by molecular oxygen in the interval 380–470°C and at an oxygen pressure 150 mm Hg has been studied. The process proceeds with self-acceleration, the rate of oxidation of each stage of it being directly proportional to the oxygen pressure. Violation of the Arrhenius law is observed in the interval 380–400°C. The oxidation rate of poly-2,6-diphenyl-1,4-phenylene oxide may be reduced four times by adding the high molecular mass antioxidant polyphenyl-phenylene phosphonate. The mechanism of inhibition of the reaction is considered.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 10","pages":"Pages 1933-1938"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90090-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88120302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stress-strain curves of glassy poly(arylate sulphone) described in terms of rubber elasticity 用橡胶弹性描述玻璃状聚芳基砜的应力-应变曲线
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90284-W
V.N. Shogenov, V.N. Belousov, V.V. Potapov, G.V. Kozlov, E.V. Prut
{"title":"Stress-strain curves of glassy poly(arylate sulphone) described in terms of rubber elasticity","authors":"V.N. Shogenov,&nbsp;V.N. Belousov,&nbsp;V.V. Potapov,&nbsp;G.V. Kozlov,&nbsp;E.V. Prut","doi":"10.1016/0032-3950(91)90284-W","DOIUrl":"10.1016/0032-3950(91)90284-W","url":null,"abstract":"<div><p>Stress-strain curves of films prepared by casting polyblock poly(arylene sulphone) from various solvents and measured between 293 and 443 K have been interpreted on the basis of equations developed for describing rubber elasticity. The concept of molecular entanglements allows one to describe practically the whole course of the stress-strain curve of the polymer in the glassy state and to explain the effect of solvent on its fundamental mechanical characteristics.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 1","pages":"Pages 155-160"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90284-W","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90799335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effect of the chemical structure of the rigid block on the properties of polyester urethane urea elastomers 刚性块的化学结构对聚氨酯脲弹性体性能的影响
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90062-U
A.A. Shipayev, L.A. Shumanov, Yu.V. Yevreinov, V.A. Shershnev
{"title":"Effect of the chemical structure of the rigid block on the properties of polyester urethane urea elastomers","authors":"A.A. Shipayev,&nbsp;L.A. Shumanov,&nbsp;Yu.V. Yevreinov,&nbsp;V.A. Shershnev","doi":"10.1016/0032-3950(91)90062-U","DOIUrl":"10.1016/0032-3950(91)90062-U","url":null,"abstract":"<div><p>A thermomechanical analysis has been made of polyester urethane ureas with non-crystallizable rigid blocks and an amorphous flexible matrix. The glass transition temperature, the devitrification interval and the compression modulus depending on the degree of phase separation are regulated not only by change in the solubility parameter of the rigid block but also by the number and position of the “hinge” groups in it. The behaviour of the polyester urethane urea elastomers at high temperatures is determined by the same factors and also by the polarity of the rigid block reflected in the temperature of the onset of devitrification of the rigid phase and the interval of its devitrification which in the end determines the performance of polyester urethane urea elastomers at high temperatures.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 11","pages":"Pages 2176-2182"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0032-3950(91)90062-U","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79746531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kinetics of graft polymerization of methyl acrylate to water soluble polysaccharides 丙烯酸甲酯与水溶性多糖接枝聚合动力学
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90245-L
V. Kislenko, A. Berlin
{"title":"Kinetics of graft polymerization of methyl acrylate to water soluble polysaccharides","authors":"V. Kislenko, A. Berlin","doi":"10.1016/0032-3950(91)90245-L","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90245-L","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"117 1","pages":"466-472"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75753872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Molecular structure and glass temperature in surface layers of poly(methyl methacrylate) films. IR spectroscopic study 聚甲基丙烯酸甲酯薄膜表层的分子结构和玻璃化温度。红外光谱研究
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90263-P
O. Tretinnikov, R. Zhbankov
{"title":"Molecular structure and glass temperature in surface layers of poly(methyl methacrylate) films. IR spectroscopic study","authors":"O. Tretinnikov, R. Zhbankov","doi":"10.1016/0032-3950(91)90263-P","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90263-P","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"9 1","pages":"589-596"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85643352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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