Polymer Science, Series B最新文献_第10页

High-Performance Catalysts Based on Hybrid Salicylaldarylimine Complexes of Titanium(IV) Dichloride for the Synthesis of Ultrahigh Molecular Weight Polyethylene with Unentangled Macromolecules 基于二氯化钛（IV）水杨醛亚胺杂化配合物的高性能催化剂，用于合成具有未缠结大分子的超高分子量聚乙烯

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-09-20 DOI: 10.1134/S1560090423701105

I. V. Oleynik, I. K. Shundrina, I. I. Oleynik

{"title":"High-Performance Catalysts Based on Hybrid Salicylaldarylimine Complexes of Titanium(IV) Dichloride for the Synthesis of Ultrahigh Molecular Weight Polyethylene with Unentangled Macromolecules","authors":"I. V. Oleynik, I. K. Shundrina, I. I. Oleynik","doi":"10.1134/S1560090423701105","DOIUrl":"10.1134/S1560090423701105","url":null,"abstract":"The features of ethylene polymerization in the presence of dichloridobis(salicylaldaryliminato)titanium(IV) complexes containing a 4-allyloxy-2,3,5,6-tetrafluorophenylimino group, namely, {2‑[(4-CH2=CH-CH2O)C6F4N=CH]-6-R1-4-R2-C6H2O}2TiCl2 (R1 = t-Bu, CMe2(Ph); R2 = H, Me, OMe, t-Bu, CMe2(Ph), Cl, Br) in the presence of methylalumoxane, have been studied. All the complexes exhibit high catalytic activity (up to 27.8 × 106 gPE ({text{mol}}_{{{text{Ti}}}}^{{ - 1}}) ({text{MPa}}_{{{{{text{C}}}_{2}}{{{text{H}}}_{4}}}}^{{ - 1}}) h–1) in the temperature range of 10‒60°C and form powdered ultrahigh molecular weight polyethylene (UHMWPE) (M = (4.4–16.0) × 106 g/mol) with a low number of intermolecular entanglements. It has been shown that during polymerization, the complexes are immobilized on UHMWPE macromolecules.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 4","pages":"387 - 397"},"PeriodicalIF":1.2,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136307101","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

Study on Synthesis and Properties of Oxybis Benzoic Aromatic Polyesters 羟基双苯甲酸芳香族聚酯的合成与性能研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-09-20 DOI: 10.1134/S1560090423701130

Caixia Zhao, Sheng Yang, Wang Qin, Guoxiang Zou

{"title":"Study on Synthesis and Properties of Oxybis Benzoic Aromatic Polyesters","authors":"Caixia Zhao, Sheng Yang, Wang Qin, Guoxiang Zou","doi":"10.1134/S1560090423701130","DOIUrl":"10.1134/S1560090423701130","url":null,"abstract":"A series of oxybis benzoic aromatic polyesters were prepared by a two-step polymerization method of esterification and polycondensation, using 4,4'-oxybis(benzoic acid) (OBBA) and aliphatic diols with different carbon chain lengths (C2-8) as monomers, and tetrabutyl titanate (TBT) as catalyst. The results showed that the Mn of the prepared polyester was between 25350–42040 g/mol, and the polymer dispersity index (PDI) was about 2.0. The results of DSC, WAXD and UV–Visible spectroscopy showed that polyethylene oxybisbenzoic (PEO), polypropylene oxybisbenzoic (PPO), polybutylene oxybisbenzoic (PBO), polypentene oxybisbenzoic (PPeO) and polyhexene oxybisbenzoic (PHO) polyesters were amorphous, and the transmittance at 550 nm (T550) were 75.0–85.2%, showing good light transmittance. The crystallization rate of polyheptylene oxybisbenzoic (PHeO) and polyoctylene oxybisbenzoic (POO) was slow, which changed from amorphous to semi-crystalline after been placed at room temperature for 10 days, resulting in no transparency. With the increase of carbon chain number of diols in polyester, the Tg of polyesters decreased gradually. TGA test results showed that PEO polyester had higher thermal stability (T5% = 407.8°C, Td = 441.9°C). The Young’s modulus and tensile strength of the polyester gradually decreased with the increase of the number of diol carbon chains. The elongation at break of polyesters with odd carbon chain diols was low (<20%), while the elongation at break of polyester with even carbon chain diols gradually increased from 4.2 to 1230.2%, which changed from brittle material to ductile material. The rheological properties analysis showed that the aromatic polyesters were typical pseudoplastic fluids.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 4","pages":"438 - 449"},"PeriodicalIF":1.2,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136306716","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

Special Features of Multiple Luminescence of the Dyad Containing Imidazole and Coumarin Fragments in Photocured Network Acrylate Polymers 光固化网络丙烯酸酯聚合物中含咪唑和香豆素片段的染料多重发光的特殊性

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-09-20 DOI: 10.1134/S1560090423701117

I. A. Matveeva, V. T. Shashkova, A. V. Lyubimov, G. V. Lyubimova, L. S. Kol’tsova, A. I. Shienok, N. L. Zaichenko

{"title":"Special Features of Multiple Luminescence of the Dyad Containing Imidazole and Coumarin Fragments in Photocured Network Acrylate Polymers","authors":"I. A. Matveeva, V. T. Shashkova, A. V. Lyubimov, G. V. Lyubimova, L. S. Kol’tsova, A. I. Shienok, N. L. Zaichenko","doi":"10.1134/S1560090423701117","DOIUrl":"10.1134/S1560090423701117","url":null,"abstract":"The conditions to prepare luminescent acrylate polymers containing the organic dyad, molecule of which combines two different emitting fragments, hydroxyl-substituted 2,4,5–triarylimidazole and 8-azomethine-7-hydroxycoumarine moieties, via photocuring have been optimized. The effect of the nature of the photocured network acrylate polymers on luminescent properties of the dyad has been investigated. The prepared aliphatic network polymers have exhibited independent fluorescence of both molecule fragments, dependent on the excitation wavelength. At the same time, the aromatic network polymers and the aliphatic network polymers containing ether links have revealed only the imidazole fragment fluorescence. The fluorescence nature has been stronger dependent on the polymer repeat unit structure and the content of the aromatic fragments in the polymer matrix than on the presence of the hydroxyl groups in the polymer. It has been shown that the emission of the imidazole fragment of the dyad in the aliphatic network polymers depends on the internode distance and conditional polarity of the medium.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 4","pages":"496 - 504"},"PeriodicalIF":1.2,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136306908","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

Organosoluble and Light-Colored Fluorinated Polyimides Prepared from Bis[4-(4-amino-2-trifluoronethylphenoxy)phenyl]ether and Aromatic Dianhydrides 由双[4-(4-氨基-2-三氟甲基苯氧基)苯基]醚和芳香族二酐制备的有机溶性浅色氟化聚酰亚胺

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-09-20 DOI: 10.1134/S1560090423701129

Yung-Chung Chen, Yu-Yang Su, Hsun-Ching Chiang

{"title":"Organosoluble and Light-Colored Fluorinated Polyimides Prepared from Bis[4-(4-amino-2-trifluoronethylphenoxy)phenyl]ether and Aromatic Dianhydrides","authors":"Yung-Chung Chen, Yu-Yang Su, Hsun-Ching Chiang","doi":"10.1134/S1560090423701129","DOIUrl":"10.1134/S1560090423701129","url":null,"abstract":"Balanced high transparency, thermal properties and organosolublility are urgent requirements for preparing polyimides. In this study, a series of fluorinated polyimides (Va-f) containing a multi-ether fluorinated diamine unit were designed. The corresponding PIs were synthesized through traditionally thermally polycondensation with bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]ether (II) and various commercial aromatic dinahydrides (IIIa-f). In particular, there are four rigid benzene rings and three flexible ether linkages in its fluorinated diamine structure (II), which is expected to achieve a balance in organic solubility and thermal properties. Va-f had inherent viscosity ranging from 0.88 to 1.24 dL/g. In addition, these fluorinated PIs exhibited high organo-solubility in common organic solvents and mechanical properties of tensile strengths of 92–116 MPa, tensile moduli of 2.0–42.3 GPa, elongations at break of 10–36%. Meanwhile, they also exhibited glass transition temperatures (Tgs) of 215–265°C, 10 wt % weight-loss temperatures of 525–597°C in N2. Among these PI films, Vf appeared excellent optical transparency, which displayed the cut-off wavelength at 361 nm with b* value of 8.7. For a comparative study, nonfluorinated analogous polyimides VIa-f were also synthesized. As a result, the fluorinated V series showed better organo-solubility, better optical property, lower dielectric constant and lower moisture absorption but without scarified thermal properties. Such attractive comprehensive properties make these fluorinated PIs as potential candidates for application in microelectronics industry.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 4","pages":"514 - 527"},"PeriodicalIF":1.2,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136306493","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

Neutral Red and Safranin Т in the Photopolymerization of Methyl Methacrylate and Other (Meth)Acrylate Monomers 中性红和红花素Т在甲基丙烯酸甲酯和其他(甲基)丙烯酸酯单体光聚合中的作用

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-08-31 DOI: 10.1134/S1560090423701099

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

引用次数: 0

Synthesis of Aromatic Polyamidines by the [2+2]-Cycloaddition Reaction [2+2]-环加成反应合成芳香族聚酰胺

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-08-18 DOI: 10.1134/S1560090423701087

D. M. Mognonov, V. V. Khakhinov, N. I. Tkacheva, S. V. Morozov

引用次数: 0

Preparation and Characterization of New Soluble and Thermally Stable Polyazomethine by Polycondensation of Thiophene-2,5-dicarboxaldehyde and Ortho-tolidine for Optoelectronics 通过噻吩-2,5-二甲醛和邻甲苯胺缩聚制备光电子学用新型可溶性热稳定性聚氮杂环胺及其表征

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-08-09 DOI: 10.1134/S1560090423701038

I. Bekri, H. Gherras, A. Dehbi, A. Belfedal

{"title":"Preparation and Characterization of New Soluble and Thermally Stable Polyazomethine by Polycondensation of Thiophene-2,5-dicarboxaldehyde and Ortho-tolidine for Optoelectronics","authors":"I. Bekri, H. Gherras, A. Dehbi, A. Belfedal","doi":"10.1134/S1560090423701038","DOIUrl":"10.1134/S1560090423701038","url":null,"abstract":"In recent years, there has been considerable interest in conducting polymeric materials containing conjugated bonds. Imine polymers, in which nitrogen atoms are incorporated into the conjugated system, offer a different approach to the formation of materials with equally interesting electronic and optical properties due to the –CH=N– group being isoelectronic with the –CH=CH– group. In this study, a polyazomethine copolymer was prepared by a polycondensation reaction using ortho-tolidine and thiophene-2,5-dicarboxaldehyde catalyzed by Maghnite H+. The effect of time, temperature, amount of Maghnite H+, and solvent on the produced copolymer material was investigated. The optical, structural, and morphological properties of the copolymer, as well as the size of the particles, were investigated using various techniques, including 1H NMR and FTIR spectroscopy, thermogravimetric analysis, scanning electron microscopy, X‑ray diffraction, and UV–Vis absorption. The optical band gap value was found to be around 2.54 eV.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 4","pages":"487 - 495"},"PeriodicalIF":1.2,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135652807","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

Reactivity of New Monomers of the Polyurethanes Green Chemistry, the Reaction Mechanism, and the Medium Effect 聚氨酯绿色化学新单体的反应性、反应机理及介质效应

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-08-09 DOI: 10.1134/S1560090423701063

M. V. Zabalov, M. A. Levina, V. G. Krasheninnikov, R. P. Tiger

引用次数: 0

Synthesis and Characterization of Poly(vanillin pyrrole)/Zinc Oxide Composite for Photocatalysis Application under Natural Sunlight Irradiation 在自然日光照射下用于光催化应用的聚香兰素吡咯/氧化锌复合材料的合成与表征

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-08-09 DOI: 10.1134/S1560090423701075

Anas Abderrahmane Lahouel, Mounir Mekidiche, Chahrazed Belmir, Abdelkader Slimane, Nabahat Sahli

{"title":"Synthesis and Characterization of Poly(vanillin pyrrole)/Zinc Oxide Composite for Photocatalysis Application under Natural Sunlight Irradiation","authors":"Anas Abderrahmane Lahouel, Mounir Mekidiche, Chahrazed Belmir, Abdelkader Slimane, Nabahat Sahli","doi":"10.1134/S1560090423701075","DOIUrl":"10.1134/S1560090423701075","url":null,"abstract":"In this investigation, methylene blue (MeB) dye degradation under simulated solar light irradiation was experimentally investigated for the photocatalytic activity of poly(vanillin pyrrole)/ZnO nanocomposite. Conducting polymers like poly(vanillin pyrrole) (PPHMB) and its derivatives are often employed as photosensitizers to enhance the photocatalytic activity of ZnO when exposed to sunlight. The co-precipitation approach was used to create the PPHMB/ZnO composite after the PPHMB was created using the cationic polycondensation method. Under sunlight irradiation, the produced composite demonstrated greater photocatalytic activity than bare ZnO for the destruction of MeB dye. A variety of characterization methods, including, XRD, TGA, and an optical analysis, were used to the produced composite. Different operational factors that might influence results, such as the starting dye concentration, the amount of radiation employed, and the impact of the dosage of PPHMB/ZnO composite, have also been explored. A UV-visible spectrophotometer was used to determine the optical density of dye degradation. Additionally, investigated was the photocatalytic activity’s repeatability.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"65 4","pages":"545 - 553"},"PeriodicalIF":1.2,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135696842","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

Bio-Based Self-Healing Polymeric Materials Derived from Furfuryl Alcohol Based on the Diels-Alder Reversible Reaction 基于Diels-Alder可逆反应的糠醇生物基自修复高分子材料

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2023-08-09 DOI: 10.1134/S1560090423701051

Zhonglin Cao, Xiaoling Zuo

引用次数: 0