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Aspects of the degradation of polystyrene on its intensive reprocessing in blends with polyethylene 聚苯乙烯在与聚乙烯共混物中密集再加工的降解方面
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90187-U
N.N. Komova, O.N. Boiko, G.Ye. Zaikov, S.V. Portnenko
{"title":"Aspects of the degradation of polystyrene on its intensive reprocessing in blends with polyethylene","authors":"N.N. Komova,&nbsp;O.N. Boiko,&nbsp;G.Ye. Zaikov,&nbsp;S.V. Portnenko","doi":"10.1016/0032-3950(91)90187-U","DOIUrl":"10.1016/0032-3950(91)90187-U","url":null,"abstract":"<div><p>Change in the mean viscous MM of polystyrene when processed on a disc extruder in a mixture with PE of varied composition has been studied. The results are analysed with reference to the rheological properties of PE-PS blends and the character of the process of degradation of PS in similar conditions. Change in the MM depends on the processing regimes and the composition of the blend. In certain regimes and ratios of components increase in the MM on processing PS with PE is possible.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 2","pages":"Pages 247-252"},"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)90187-U","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86724161","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
Aspects of the degradation of water-soluble cellulose derivatives in the course of oxidation by trivalent cobalt salts 水溶性纤维素衍生物在三价钴盐氧化过程中的降解问题
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90036-P
S.F. Bartoshevich, I.A. Nemchinov, V.A. Molotkov, S.I. Klenin
{"title":"Aspects of the degradation of water-soluble cellulose derivatives in the course of oxidation by trivalent cobalt salts","authors":"S.F. Bartoshevich,&nbsp;I.A. Nemchinov,&nbsp;V.A. Molotkov,&nbsp;S.I. Klenin","doi":"10.1016/0032-3950(91)90036-P","DOIUrl":"10.1016/0032-3950(91)90036-P","url":null,"abstract":"<div><p>Molecular hydrodynamic methods (viscometry, sedimentation-diffusion analysis) have shown that on interaction of water-soluble cellulose derivatives (carboxymethyl-, oxyethyl- and oxypropyl-cellulose) with Co<sup>3+</sup> ions degradation results in the formation of fragments of polymer chains with practically the same degree of polymerization (180 ± 10) and a narrow <span><math><mtext>MMD</mtext><mtext> (</mtext><mtext>M</mtext><msub><mi></mi><mn>w</mn></msub><mtext>/</mtext><mtext>M</mtext><msub><mi></mi><mn>n</mn></msub><mtext>) = 1.1–1.2</mtext></math></span>. The results are interpreted on the basis of the assumption that the macromolecules of cellulose derivatives contain regularly arranged “weak” bonds, and assumption confirmed by computer modelling of this process.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 8","pages":"Pages 1526-1533"},"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)90036-P","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86883135","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
Orientational-deformational nature of flow birefringence in solutions of worm-like chains 蠕虫状链溶液中流动双折射的定向-变形性质
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90021-H
N.V. Pogodina
{"title":"Orientational-deformational nature of flow birefringence in solutions of worm-like chains","authors":"N.V. Pogodina","doi":"10.1016/0032-3950(91)90021-H","DOIUrl":"10.1016/0032-3950(91)90021-H","url":null,"abstract":"<div><p>It has been confirmed experimentally that dynamic birefringence in solution worm-like chains is orientation-deformational in nature. It is shown that it is possible to determine the coefficient of internal viscosity of a worm-like chain directly from the way in which the relaxation time depends on the solvent's viscosity and that it is displayed indirectly in the relaxation time in the way in which the model coefficient depends on the degree of chain convolution.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 9","pages":"Pages 1838-1847"},"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)90021-H","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86216642","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
Study of polyorganocarbosilanes based on calculation of the volume increments 基于体积增量计算的多有机碳硅烷的研究
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90170-U
V.M. Polikarpov, Ye.V. Matukhina, Yu.P. Polyakov, P.M. Matveichev, N.V. Ushakov, N.B. Bespalova, I.V. Razumovskaya, Ye.M. Antipov
{"title":"Study of polyorganocarbosilanes based on calculation of the volume increments","authors":"V.M. Polikarpov,&nbsp;Ye.V. Matukhina,&nbsp;Yu.P. Polyakov,&nbsp;P.M. Matveichev,&nbsp;N.V. Ushakov,&nbsp;N.B. Bespalova,&nbsp;I.V. Razumovskaya,&nbsp;Ye.M. Antipov","doi":"10.1016/0032-3950(91)90170-U","DOIUrl":"10.1016/0032-3950(91)90170-U","url":null,"abstract":"<div><p>Characteristic parameters of some polyorganocarbosilanes have been determined and compared by means of the calculation of volume increments, and also by experimental methods based on X-ray structural analysis, thermomechanical analysis and DSC. It is shown that the volume increments method may be used to calculate the packing coefficients, melting points, <em>T</em><sub>g</sub> and the <em>T</em><sub>g</sub>/<em>T</em><sub>melt</sub> ratios for these polymers. The results of experimental determinations of the studied parameters show that the calculations are highly accurate, and that the properties of the polymers may be predicted from their structural formulae.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 5","pages":"Pages 1001-1005"},"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)90170-U","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86345787","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
Separation by dynamic light scattering of internal motion in polymer coils from brownian motion 聚合物线圈内部运动与布朗运动的动态光散射分离
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90265-R
N. Griko, A. Timchenko, A. Kipper, I. Baranovskaya, S. Lyubina, S. I. Klenin, I. Serdyuk
{"title":"Separation by dynamic light scattering of internal motion in polymer coils from brownian motion","authors":"N. Griko, A. Timchenko, A. Kipper, I. Baranovskaya, S. Lyubina, S. I. Klenin, I. Serdyuk","doi":"10.1016/0032-3950(91)90265-R","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90265-R","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"34 1","pages":"603-609"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85660751","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
Viscosity of moderately concentrated solutions of copolymers and the acrylamide homopolymer 中等浓度的共聚物和丙烯酰胺均聚物溶液的粘度
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90150-O
V.P. Budtov, L.A. Itskovich, V.Ya. Kabo, V.A. Maslennikov, L.V. Mineyev
{"title":"Viscosity of moderately concentrated solutions of copolymers and the acrylamide homopolymer","authors":"V.P. Budtov,&nbsp;L.A. Itskovich,&nbsp;V.Ya. Kabo,&nbsp;V.A. Maslennikov,&nbsp;L.V. Mineyev","doi":"10.1016/0032-3950(91)90150-O","DOIUrl":"10.1016/0032-3950(91)90150-O","url":null,"abstract":"<div><p>The viscosities of dilute and moderately concentrated solutions of PAA (<em>M</em> × 10<sup>6</sup> = 0.43–6.5) have been studied in aqueous and water-methanolic solutions and acrylamide and sodium acrylate copolymers (composition <em>α</em><sub><em>h</em></sub> = 0.05–0.6, <em>M</em> = 3.1 × 10<sup>6</sup>) in aqueous NaCl solution. The experimental data are compared with the theoretical results. Correlations describing the observed patterns have been obtained.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 5","pages":"Pages 862-870"},"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)90150-O","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83138694","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
On the properties of network segmented polyester urethanes 网段聚酯聚氨酯的性能研究
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90244-K
N. P. Apukhtina, I. V. Dal’gren, N.Ye. Lukina, T. A. Yagfarova, A. Gubaidullin, B. Teitel'baum
{"title":"On the properties of network segmented polyester urethanes","authors":"N. P. Apukhtina, I. V. Dal’gren, N.Ye. Lukina, T. A. Yagfarova, A. Gubaidullin, B. Teitel'baum","doi":"10.1016/0032-3950(91)90244-K","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90244-K","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"145 1","pages":"458-466"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75857670","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
Dynamo-optical and electro-optical properties of solutions of diphenyl-substituted poly-para-phenylene terephthalate in polar and non-polar solvents 极性和非极性溶剂中二苯基取代聚对苯二甲酸乙二醇酯溶液的动力光学和电光性质
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90197-X
V.N. Tsvetkov, L.N. Andreyeva, A.P. Filippov, Ye.V. Belyneva, A.Yu. Bilibin, A.R. Stepanova
{"title":"Dynamo-optical and electro-optical properties of solutions of diphenyl-substituted poly-para-phenylene terephthalate in polar and non-polar solvents","authors":"V.N. Tsvetkov,&nbsp;L.N. Andreyeva,&nbsp;A.P. Filippov,&nbsp;Ye.V. Belyneva,&nbsp;A.Yu. Bilibin,&nbsp;A.R. Stepanova","doi":"10.1016/0032-3950(91)90197-X","DOIUrl":"10.1016/0032-3950(91)90197-X","url":null,"abstract":"<div><p>The flow and electrical birefringence in solution of a number of fractions of <em>para</em>-aromatic polyester are studied, using dioxane and dichloracetic acid as solvents. In passing from a non-polar (dioxane) solvent to a polar solvent the optical and hydrodynamic properties of the molecular chain remain unchanged, whereas the electro-optical characteristics undergo sharp changes. The hydrodynamic and dynamo-optical characteristics of the polymer under study in dioxane correspond to the properties of a typical rigid chain polymer, whereas the electro-optical properties are typical of a flexible chain. This unique combination of properties can be explained by the specific dipole structure of the monomer unit and the significant difference in the longitudinal and lateral dipole rigidity of the polymer chain of the polyester under study.</p></div>","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"33 2","pages":"Pages 316-324"},"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)90197-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82081708","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
Structure of intumescent char formed by pyrolysis and burning of polymers containing intumescent fire retardants 含膨胀阻燃剂的聚合物热解燃烧后形成的膨胀焦的结构
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90335-N
Ye.V. Gnedin, N. Kozlova, R. Gitina, O. N. Fedoseyeva, M. Sevost’yanov, S. Novikov
{"title":"Structure of intumescent char formed by pyrolysis and burning of polymers containing intumescent fire retardants","authors":"Ye.V. Gnedin, N. Kozlova, R. Gitina, O. N. Fedoseyeva, M. Sevost’yanov, S. Novikov","doi":"10.1016/0032-3950(91)90335-N","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90335-N","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"23 1","pages":"1458-1466"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82182872","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
Physicochemical properties and morphology of poly-p-xylylene film surfaces 聚对二甲苯薄膜表面的物理化学性质和形态
Polymer Science U.s.s.r. Pub Date : 1991-01-01 DOI: 10.1016/0032-3950(91)90330-S
K. Mailyan, A. V. Pebalk, Y. Mishina, I. Kardash
{"title":"Physicochemical properties and morphology of poly-p-xylylene film surfaces","authors":"K. Mailyan, A. V. Pebalk, Y. Mishina, I. Kardash","doi":"10.1016/0032-3950(91)90330-S","DOIUrl":"https://doi.org/10.1016/0032-3950(91)90330-S","url":null,"abstract":"","PeriodicalId":20280,"journal":{"name":"Polymer Science U.s.s.r.","volume":"25 1","pages":"1420-1426"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82437175","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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