Polymer Science, Series B最新文献_第2页

Influence of Rheological Characteristics of Solutions of Mixtures of N-Succinyl Chitosan and Carboxymethylcellulose Sodium Salts on Some Properties of Materials Obtained from These Solutions n -琥珀酰壳聚糖与羧甲基纤维素钠盐混合物溶液流变特性对所得材料某些性能的影响

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-07-03 DOI: 10.1134/S1560090423700689

M. V. Bazunova, A. S. Shurshina, V. V. Chernova, R. Yu. Lazdin, E. I. Kulish

{"title":"Influence of Rheological Characteristics of Solutions of Mixtures of N-Succinyl Chitosan and Carboxymethylcellulose Sodium Salts on Some Properties of Materials Obtained from These Solutions","authors":"M. V. Bazunova, A. S. Shurshina, V. V. Chernova, R. Yu. Lazdin, E. I. Kulish","doi":"10.1134/S1560090423700689","DOIUrl":"10.1134/S1560090423700689","url":null,"abstract":"Structuring in solutions of the individual polymers sodium N-succinyl chitosan and sodium carboxymethylcellulose and their mixtures has been experimentally evaluated. The possibility of controlling both the degree of enzymatic degradation and other properties of materials obtained on their basis is shown. In binary mixtures, supramolecular structures represented by homoaggregates of both polymers are likely to appear, which are characterized by an increased packing density and a slow rate of chemical and biochemical transformations. The mixing of N-succinyl chitosan and carboxymethylcellulose sodium salts in solution enhances aggregation processes. The type of aggregates (homo- or hetero-) is determined by the concentration of the polymers in the initial solution: homoaggregates are formed in dilute solutions of the mixture (with a concentration on the order of the entanglement-network formation concentration), and mixed heteroaggregates appear in more concentrated solutions. It has been established that the stress–strain characteristics, the degree of enzymatic hydrolysis increases, and the sorption capacity of film materials obtained from such mixtures are enhanced (compared to additive values) when heteroaggregates appear in a solution of polymer mixtures, whereas all these parameters have reduced values when homoaggregates are formed in solutions of polymer mixtures.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 1","pages":"50 - 57"},"PeriodicalIF":1.2,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4125925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","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 80th Anniversary of the Birth of Academician Yuri Borisovich Monakov 纪念尤里·鲍里索维奇·莫纳科夫院士诞辰80周年

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-07-03 DOI: 10.1134/S1560090423700720

引用次数: 0

Intermolecular Interactions between Iodine and Low-Methoxylated Apple Pectin Modified with Pharmacophores 碘与药效团修饰的低甲氧基苹果果胶的分子间相互作用

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-07-03 DOI: 10.1134/S1560090423700732

R. Kh. Mudarisova, A. F. Sagitova, O. S. Kukovinets, S. V. Kolesov

引用次数: 0

NMR Investigation of Tetrad Splitting in Regularly Alternating Diphenylene Oxide–Diphenylene Sulfide Copolyarylenephthalides of Periodic Structure 周期性结构二苯氧基-二苯硫基共聚物四元分裂的核磁共振研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-07-03 DOI: 10.1134/S1560090423700707

V. A. Kraikin, A. A. Fatykhov, N. G. Gileva, T. A. Yangirov, S. N. Salazkin

{"title":"NMR Investigation of Tetrad Splitting in Regularly Alternating Diphenylene Oxide–Diphenylene Sulfide Copolyarylenephthalides of Periodic Structure","authors":"V. A. Kraikin, A. A. Fatykhov, N. G. Gileva, T. A. Yangirov, S. N. Salazkin","doi":"10.1134/S1560090423700707","DOIUrl":"10.1134/S1560090423700707","url":null,"abstract":"Tetrad splitting of the quaternary sp3-hybridized carbon atom in a series of model (co)poly-arylenephthalides differing in the length of the phenyleneoxyphthalide (O) and phenylenethiophthalide (S) sequences: O-1, OOOS-2, OOS-3, OS-4, SSO-5, SSSO-6, S-7, and OOSS-8 has been studied using the increments method. Basing on the analysis of the amplitude values of the dyad increments, the tetrad increments have been calculated and the position of the signals of the tetrads in the 13С NMR spectra of the individual (co)polyarylenephthalides and their mixtures has been predicted. Validity of the calculations has been confirmed by the coincidence between the predicted and the experimental values of the dyad and tetrad increments for the specifically synthesized (co)polyarylenephthalide OOSS-8, the spectra of the mixtures of the (co)polyarylenephthalides with equimolar content of the split tetrads, and good coincidence of their starting compositions calculated from the deconvoluted spectra.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 1","pages":"69 - 77"},"PeriodicalIF":1.2,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4125423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Features of Methyl Methacrylate Polymerization Mediated by Methylene Blue and Ethyl 2-Bromoisobutyrate under Photoirradiation Conditions 光照射下亚甲基蓝和2-溴异丁酸乙酯介导甲基丙烯酸甲酯聚合的特性

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-06-19 DOI: 10.1134/S1560090423700975

O. S. Lizyakina, L. B. Vaganova, D. F. Grishin

引用次数: 0

Synthesis, Characterization and Adsorption Study of Methyl Orange on Imidazolium-based Poly (Ionic Liquid) Hydrogels 甲基橙在咪唑基聚离子液体凝胶上的合成、表征及吸附研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-06-19 DOI: 10.1134/S1560090423700987

F. Farshi Azhar, M. Bagheri, A. Dehghani

{"title":"Synthesis, Characterization and Adsorption Study of Methyl Orange on Imidazolium-based Poly (Ionic Liquid) Hydrogels","authors":"F. Farshi Azhar, M. Bagheri, A. Dehghani","doi":"10.1134/S1560090423700987","DOIUrl":"10.1134/S1560090423700987","url":null,"abstract":"New monomeric ionic liquid, 1-butyl-3-(2-hydroxy-3-methacryloyloxy) propyl imidazolium salt was successfully synthesized by chemical modification of glycidyl methacrylate with 1-butyl imidazole. Then, ionic liquid copolymer hydrogels were synthesized by radical crosslinking polymerization of monomeric ionic liquid and methacrylic acid with different molar ratios in the presence of ethylene glycol dimethacrylate as a cross-linker. The prepared hydrogels have been characterized by FTIR, SEM, and swelling test. The hydrogel with 1 : 1 molar ratio of monomers displayed its efficiency in methyl orange adsorption from aqueous solution. The impact of effective parameters such as initial dye concentration, pH, and adsorbent dosage on adsorption capacity was studied and modeled using central composite design superimposed with response surface methodology. ANOVA calculations displayed a high value for coefficient of determination and a second-order regression model with satisfactory prediction was achieved. To estimate the combined effects of the independent factors, response surface plots were generated. Besides, kinetics and isotherm experiments were studied on the developed system. The Langmuir isotherm model described best the data with 0.997 consistency and maximum adsorption capacity of 43.1 mg/g. The adsorption kinetics obeyed a first-order kinetic model. The properties of the prepared hydrogel confirmed that it can be exploited as an efficient adsorbent in the wastewater treatment.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 3","pages":"319 - 331"},"PeriodicalIF":1.2,"publicationDate":"2023-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4753841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Modified MgO Whisker on Mechanical and Tribological Properties of Oil-Impregnated Monomer Casting Nylon 改性MgO晶须对油浸单体铸造尼龙力学和摩擦学性能的影响

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-06-13 DOI: 10.1134/S1560090423700963

Yaxuan Zhu, Yuxin Wang, Yuexin Wang, Gang Liu, Qian Zhang

{"title":"Effect of Modified MgO Whisker on Mechanical and Tribological Properties of Oil-Impregnated Monomer Casting Nylon","authors":"Yaxuan Zhu, Yuxin Wang, Yuexin Wang, Gang Liu, Qian Zhang","doi":"10.1134/S1560090423700963","DOIUrl":"10.1134/S1560090423700963","url":null,"abstract":"The magnesium oxide whisker was commonly used as reinforcement for polymer. In this study, magnesium oxide whisker was firstly modified by γ-aminopropyl triethoxysilane and n-octadecylamine activated by N,N'-carbonyldiimidazole. Then the modified magnesium oxide whisker was introduced into oil-impregnated monomer casting nylon. The final composite was obtained by in situ polymerization. The mechanical and tribological properties of composite with different contents of modified magnesium oxide whisker were investigated. The results showed that the mechanical and tribological performances of the composites were observably improved by growth of tensile strength, flexural strength, elongation at break, and impact strength. The tribological test results indicated that reduction in the frictional coefficient and the abrasion loss was achieved. The surface lipophilicity of composites obviously increased also. This work provided a simple method for designing composites with excellent mechanical and frictional properties which may greatly broaden the application potential of composites.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 3","pages":"372 - 386"},"PeriodicalIF":1.2,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4542223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

On the Absence of Cyclic Structures in Branched Polystyrenes Synthesized by Living Three-Dimensional Radical Polymerization in the Medium of a Deteriorating Thermodynamic Quality Solvent 活性三维自由基聚合法制备支化聚苯乙烯中无环结构的研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-06-13 DOI: 10.1134/S1560090423700938

S. A. Kurochkin, L. I. Makhonina, E. O. Perepelitsina, M. L. Bubnova, M. P. Berezin, V. P. Grachev

{"title":"On the Absence of Cyclic Structures in Branched Polystyrenes Synthesized by Living Three-Dimensional Radical Polymerization in the Medium of a Deteriorating Thermodynamic Quality Solvent","authors":"S. A. Kurochkin, L. I. Makhonina, E. O. Perepelitsina, M. L. Bubnova, M. P. Berezin, V. P. Grachev","doi":"10.1134/S1560090423700938","DOIUrl":"10.1134/S1560090423700938","url":null,"abstract":"Branched polystyrenes are synthesized by the radical copolymerization of styrene and divinylbenzene with reversible inhibition (in the presence of 2,2,6,6-tetramethylpiperidine-1-oxyl) under deteriorating thermodynamic quality of the solvent. The resulting polymers are studied by size-exclusion chromatography combined with static light scattering, ozonolysis, NMR spectroscopy, and differential scanning calorimetry. The branched polymers synthesized by living radical polymerization are characterized by lower intrinsic viscosity values than their linear analogs. Kuhn–Mark–Houwink parameters for these polymers in a tetrahydrofuran solution (а = 0.29) confirm the nonlinear architecture of macromolecules and a high content of pendant double bonds comparable in the order of magnitude with their theoretical content in the absence of the cyclization reaction indicate their branched structure. The glass transition temperature of the branched polystyrenes is 20–35°С lower than the glass transition temperature of the linear polystyrene.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 3","pages":"284 - 293"},"PeriodicalIF":1.2,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4543682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polyampholite–Metal Complexes for Catalytic Processes 催化过程中的聚两性石-金属配合物

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-06-13 DOI: 10.1134/S156009042370094X

V. A. Lipin, T. A. Poshvina, K. A. Fedorova, A. F. Fadin, N. V. Maltseva, T. A. Vishnevskaya

{"title":"Polyampholite–Metal Complexes for Catalytic Processes","authors":"V. A. Lipin, T. A. Poshvina, K. A. Fedorova, A. F. Fadin, N. V. Maltseva, T. A. Vishnevskaya","doi":"10.1134/S156009042370094X","DOIUrl":"10.1134/S156009042370094X","url":null,"abstract":"Polyampholyte–metal complexes based on polyacrylic acid; the aliphatic diamines ethylenediamine, 1,3-diaminopropane, and 1,4-diaminobutane; and Cu2+ was obtained by reacting aqueous solutions of polyampholytes and CuSO4. Using the method of simultaneous thermal analysis, it was found that the thermal degradation of the complexes occurs in three steps. The activation energy of thermal degradation of the polyampholyte–metal complexes is 22–99 kJ/mol. It was established by X-ray diffraction analysis that the products of thermal degradation of polyampholyte–metal complexes are heterogeneous systems composed of CuO and Cu2O phases, while catalysts based on them are heterogeneous systems consisting of Al2O3 and CuO phases. The size distribution of catalyst pores showed that the volume of pores with a diameter of less than 773 nm was 0.80–0.83 cm3/g, the specific surface area was 349–351 m2/g, and the predominant equivalent pore diameter was 6.2–6.3 nm. The mechanical crushing strength of catalyst pellets was found to be 7.1–7.3 MPa. In the process of CO oxidation to CO2, the catalyst began to exhibit its activity at 180–187°C; the complete conversion of CO in the oxidation reaction was achieved at 280–286°C. The performance of the obtained catalysts was 2.7–2.8 times higher than that of a reference sample.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 3","pages":"346 - 355"},"PeriodicalIF":1.2,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4545538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Epoxy-Amine Systems with Reactive Guanidine Derivatives 反应性胍衍生物的环氧胺体系

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-05-29 DOI: 10.1134/S1560090423700896

I. N. Senchikhin, M. S. Merkulova, I. P. Sedishev, N. E. Grammatikova, O. Ya. Uryupina, E. K. Urodkova, E. S. Zhavoronok

{"title":"Epoxy-Amine Systems with Reactive Guanidine Derivatives","authors":"I. N. Senchikhin, M. S. Merkulova, I. P. Sedishev, N. E. Grammatikova, O. Ya. Uryupina, E. K. Urodkova, E. S. Zhavoronok","doi":"10.1134/S1560090423700896","DOIUrl":"10.1134/S1560090423700896","url":null,"abstract":"The modification of epoxy-amine systems with reactive monomeric derivatives based on guanidine has been attempted in order to create novel polymer coatings suppressing activity of pathogens. Preliminary chemical interaction of these compounds with the epoxy component allows their covalent incorporation into the epoxy-amine network to ensure prolonged action of the coating. The synthesized guanidine hydrosalicylate, hydro-4-aminosalicylate, hydro-5-sulfosalicylate, and dihydro-5-sulfosalicylate have been characterized by means of elemental and thermal analysis. The degree of hydrochloride substitution with the organic salt residue and temperature of onset of the thermal decomposition under argon as well as temperatures of the salts vitrification and melting have been determined. Solubility of the synthesized salts in a diane-epoxy oligomer has been estimated. It has been shown that the substitution of hydrochloride with the organic residue noticeably decreases the temperature of the onset of the reaction with the epoxy oligomer. Average functionality of the guanidine salts in the reaction with the epoxy oligomer has been determined; it has been revealed that most of the N‒Н groups of the modifiers are involved in the reaction, in certain cases these being the residues of the organic salts. Stoichiometry of the guanidine‒epoxy oligomer binary mixtures as well as this of the adducts synthesized with the oligomeric amine curing agent Jeffamine D-230 are presented. The initial tests of the obtained films have revealed pronounced bacteriostatic activity towards the methicillin-resistant S. Еpidermidis at the guanidine hydrosalicylate content as low 1 wt %, the parameter of the film forming suppression being 19.2%.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 2","pages":"133 - 143"},"PeriodicalIF":1.2,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5124246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0