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Mechanism of phase separation of polystyrene gels disturbed and not disturbed by a mechanical field 受力场干扰和不受力场影响的聚苯乙烯凝胶相分离机理
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90290-7
S.A. Vshivkov, Ye.V. Rusinova
{"title":"Mechanism of phase separation of polystyrene gels disturbed and not disturbed by a mechanical field","authors":"S.A. Vshivkov,&nbsp;Ye.V. Rusinova","doi":"10.1016/0032-3950(91)90290-7","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90290-7","url":null,"abstract":"<div><p>The phase equilibrium of PS gels with a network of different density in cyclohexane in the non-deformed state in conditions of uniaxial stretching and all-sided compression has been studied. The pulsing mechanism of phase separation of the gels was found manifest in the fluctuational character of the rate of their clouding, squeezing out of the solvent and non-monotonic change in their geometric dimensions and also the radii of the light-scattering particles.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 12","pages":"Pages 2383-2390"},"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)90290-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72231242","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
List of contents and author index volume 33, 1991 目录和作者索引1991年第33卷
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90309-E
{"title":"List of contents and author index volume 33, 1991","authors":"","doi":"10.1016/0032-3950(91)90309-E","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90309-E","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 12","pages":"Pages iii-xxvi"},"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)90309-E","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72231246","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
Influence of external effects on the structure and molecular dynamics of oriented copolymers and blends on the basis of polypropylene and polyethylene 外部效应对聚丙烯和聚乙烯定向共聚物及其共混物结构和分子动力学的影响
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90297-4
S.G. Karpova, A.A. Popov, G.Ye. Zaikov, K. Barabash, M. Mesko
{"title":"Influence of external effects on the structure and molecular dynamics of oriented copolymers and blends on the basis of polypropylene and polyethylene","authors":"S.G. Karpova,&nbsp;A.A. Popov,&nbsp;G.Ye. Zaikov,&nbsp;K. Barabash,&nbsp;M. Mesko","doi":"10.1016/0032-3950(91)90297-4","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90297-4","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 12","pages":"2435-2444"},"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)90297-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72231235","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
Macromolecular effects in radical polymerization 自由基聚合中的大分子效应
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90317-J
Yu.D. Semchikov, V.F. Gromov, E.N. Teleshov
{"title":"Macromolecular effects in radical polymerization","authors":"Yu.D. Semchikov,&nbsp;V.F. Gromov,&nbsp;E.N. Teleshov","doi":"10.1016/0032-3950(91)90317-J","DOIUrl":"10.1016/0032-3950(91)90317-J","url":null,"abstract":"<div><p>Data on the dependence of the composition of the copolymer on its MM and the influence of the nature of the solvent on the rate of radical polymerization of water-soluble monomers and the MM of the polymers formed not allowed for by the classical theory of radical polymerization are discussed. It is shown that for all the apparent difference the effects observed in the two cases may be explained in terms of change of the characteristic of the macromolecular coil in which the polymerization reaction takes place.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 7","pages":"Pages 1322-1335"},"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)90317-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84702089","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
The synthesis and use of three-dimensional structure activators based on N-acryloylcaprolactam in the anionic polymerization of caprolactam 基于n -丙烯基己内酰胺的三维结构活化剂的合成及在己内酰胺阴离子聚合中的应用
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90020-Q
V.V. Kurashev, V.A. Kotel'nikov, R.B. Shleifman, S.V. Tsutsuran, A.A. Askadskii, V.G. Vasil'yev, V.V. Kazantseva, K.A. Bychko
{"title":"The synthesis and use of three-dimensional structure activators based on N-acryloylcaprolactam in the anionic polymerization of caprolactam","authors":"V.V. Kurashev,&nbsp;V.A. Kotel'nikov,&nbsp;R.B. Shleifman,&nbsp;S.V. Tsutsuran,&nbsp;A.A. Askadskii,&nbsp;V.G. Vasil'yev,&nbsp;V.V. Kazantseva,&nbsp;K.A. Bychko","doi":"10.1016/0032-3950(91)90020-Q","DOIUrl":"10.1016/0032-3950(91)90020-Q","url":null,"abstract":"<div><p>A description is given of the synthesis of PA by the anionic polymerization of caprolactam in the presence of new macromolecular polyfunctional activators that promote a three-dimensional structure. PA of this type have a cross-linked structure (gel-fraction in cresol amounts to 100 wt%). The size of the inter-node fragment of the network has been determined as 9850-18500. The PA synthesized are distinguished by a high value of specific impact strength (12–34 kJ/m<sup>2</sup> in the Izod test) and are characterized by the existence of hyperelasticity in the temperature range 220–300°C.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 9","pages":"Pages 1831-1837"},"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)90020-Q","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88077430","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
Theory of weak supercrystallinity in melts of two-component copolymers of complicated chemical structure. Fluctuation effects 复杂化学结构双组分共聚物熔体弱超结晶度理论。波动的影响
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90172-M
A.V. Dobrynin, I.Ya. Yerukhimovich
{"title":"Theory of weak supercrystallinity in melts of two-component copolymers of complicated chemical structure. Fluctuation effects","authors":"A.V. Dobrynin,&nbsp;I.Ya. Yerukhimovich","doi":"10.1016/0032-3950(91)90172-M","DOIUrl":"10.1016/0032-3950(91)90172-M","url":null,"abstract":"<div><p>The influence of fluctuation effects on supercrystallization (formation of domain structure) in melts of two-component copolymers of complicated chemical structure was studied by a refined variation method, generalizing the results of the Brazovskii theory of weak crystallization to the case of arbitrary angular dependence of node functions. By means of numerical calculations, the phase diagrams of transitions into the supercrystalline state were constructed and analysed in a space of parameters describing the chemical structure and temperature of the copolymer, for the following types of copolymeric systems: asymmetrical triblock and trigraft copolymers, star copolymers (A<sub><em>n</em></sub>)<sub><em>k</em></sub>(B<sub><em>m</em></sub>)<sub><em>k</em></sub>, as well as polyblock and polygraft copolymers. By taking account of the fluctuation effects, qualitative agreement is obtained with the results of Fredrickson and Helfand on changes in the structure of the transition sequence previously found by the authors using the mean field approximation.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 5","pages":"Pages 1012-1027"},"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)90172-M","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85370487","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: 3
Magneto-spin effects during the synthesis and chemical conversions of polymers. Review 聚合物合成和化学转化过程中的磁自旋效应。审查
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90001-7
V.B. Ivanov
{"title":"Magneto-spin effects during the synthesis and chemical conversions of polymers. Review","authors":"V.B. Ivanov","doi":"10.1016/0032-3950(91)90001-7","DOIUrl":"10.1016/0032-3950(91)90001-7","url":null,"abstract":"<div><p>The author looks at the influence of an external magnetic field and nuclear spin states of reactants on the polymerization rate and MM of the polymer formed and also the rates and directions of the chemical processes occurring in macromolecular systems. He discusses the correspondence of the experimental data to theoretical notions on the influence of the magnetic field and isotope composition of the molecules on the singlet-triplet conversion of radical pairs, key intermediate particles of the processes. The role of the molecular organization of the medium as one of the main factors determining the scale of the phenomena is analysed. The link between the effects observed and molecular dynamics in solutions, in micellar systems and solid polymers is discussed. The possibilities of using the effects discussed for studying the mechanisms of the processes and also for additional regulation are noted.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 9","pages":"Pages 1691-1708"},"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)90001-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79368178","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
Intramolecularly crosslinked polystyrene as model of a supercrosslinked network 分子内交联聚苯乙烯作为超交联网络的模型
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90304-9
M.P. Tsyurupa, L.A. Maslova, T.A. Mrachkovskaya, V.A. Davankov
{"title":"Intramolecularly crosslinked polystyrene as model of a supercrosslinked network","authors":"M.P. Tsyurupa,&nbsp;L.A. Maslova,&nbsp;T.A. Mrachkovskaya,&nbsp;V.A. Davankov","doi":"10.1016/0032-3950(91)90304-9","DOIUrl":"10.1016/0032-3950(91)90304-9","url":null,"abstract":"<div><p>Globular soluble intramolecularly crosslinked polystyrene (PS) was prepared both by reaction of individual PS coils with monochlorodimethylether in the presence of tin chloride, and by reaction of chloromethyl groups in previously chloromethylated coils with the phenyl rings of the same macromolecule. The concentration of the initial polymer solution subjected to intramolecular crosslinking was 0.1–0.5%. By viscometric, electron microscopic and GPC methods it was established that the globules represent individual PS macromolecules strengthened by a large number of intramolecular crosslinks. The globules of intramolecularly crosslinked PS exhibit the same properties as supercrosslinked PS networks: their internal specific surface reaches 800–1000 m<sup>2</sup>/g and they can swell in methanol. The equivalence of these unusual properties directly proves that they result from the specific features of supercrosslinked structures at molecular level.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 12","pages":"Pages 2497-2503"},"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)90304-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73221630","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
Use of radiation graft polymerization for synthesizing and modifying gas-separating membranes—review 辐射接枝聚合在气体分离膜合成与改性中的应用综述
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90311-D
S.A. Pavlov, E.N. Teleshov
{"title":"Use of radiation graft polymerization for synthesizing and modifying gas-separating membranes—review","authors":"S.A. Pavlov,&nbsp;E.N. Teleshov","doi":"10.1016/0032-3950(91)90311-D","DOIUrl":"10.1016/0032-3950(91)90311-D","url":null,"abstract":"<div><p>The synthetic possibilities of the radiation graft polymerization method for synthesizing and modifying membranes and the functionalization of the materials of membrane technology are reviewed. Attention is focused on the problems of synthesis of gas-separating membranes. In this connection the review also touches on the problems of imparting hydrophilic and ion-exchange properties to membranes. The relationship between the sorption, diffusional and some other properties of membranes, the aspects of their structure and the conditions of conducting synthesis is analysed.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 7","pages":"Pages 1259-1285"},"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)90311-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79169869","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
Correlation between the microstructure and properties of haemocompatible polyetherurethane ureas 血液相容性聚聚氨酯脲的微观结构与性能的关系
Polymer Science U.s.s.r. Pub Date : 1991-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0032-3950(91)90164-L
A.V. Trezvova, O.G. Fortunatov, M.P. Letunovskii, L.L. Razumova, A.A. Veretennikova, N.P. Tsakulin
{"title":"Correlation between the microstructure and properties of haemocompatible polyetherurethane ureas","authors":"A.V. Trezvova,&nbsp;O.G. Fortunatov,&nbsp;M.P. Letunovskii,&nbsp;L.L. Razumova,&nbsp;A.A. Veretennikova,&nbsp;N.P. Tsakulin","doi":"10.1016/0032-3950(91)90164-L","DOIUrl":"10.1016/0032-3950(91)90164-L","url":null,"abstract":"<div><p>The effect of the proportion of rigid blocks in segmented polyetherurethane ureas on their mechanical properties is studied. It is established that there are two critical points on the plots of the properties of the polymers against temperature, in which the nature of the behaviour of the system changes its character. It is shown by small angle X-ray scattering that at these points the type of supermolecular (domain) structure of the polyetherurethane urea changes.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 5","pages":"Pages 961-966"},"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)90164-L","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85611797","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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