Polymer Science, Series B最新文献_第10页

Synthesis of Bis-GMA Grafted Co-Polymer of Acrylic–Itaconic Acid and its Composite 丙烯酸衣康酸双- gma接枝共聚物的合成及其复合材料

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-05-30 DOI: 10.1134/S1560090422700130

Mayuri Gupta, A. K. Tyagi, Manoj Raula

{"title":"Synthesis of Bis-GMA Grafted Co-Polymer of Acrylic–Itaconic Acid and its Composite","authors":"Mayuri Gupta, A. K. Tyagi, Manoj Raula","doi":"10.1134/S1560090422700130","DOIUrl":"10.1134/S1560090422700130","url":null,"abstract":"This study aims to develop a LED curable composite with higher compressive strength. We are reporting the synthesis of copolymers from acrylic and itaconic acid using simple free radical polymerization technique. The synthesized copolymer (acrylic-co-itaconic acid) was then grafted with bisphenol A-glycidyl methacrylate (Bis-GMA) using conventional condensation polymerization technique. The synthesized and purified copolymer was then characterized using FTIR, DSC, and TGA. We also synthesized glass ionomer powder using well established melt and quench method using various inorganic components, such as, SiO2, Al2O3, CaO, NaF, AlF3, P2O5, and Na3AlF6. The synthesized glass ionomer powder was characterized using powder X-ray diffraction and scanning electron microscopic techniques. Finally, we prepared the copolymer-glass ionomer composite by mixing the grafted copolymer and the glass ionomer with hydroxymethacrylate and camphorquinone. The resultant composite was cured with a LED light (440–480 nm) for 20 s and its surface morphology was studied using scanning electron microscopy. The compressive strength of the developed LED cured composite material and the commercially available Vitrebond (3M ESPE), a resin modified glass ionomer was compared using Universal Tensile Machine. It was found that the developed composite is 35% more strong in terms of compressive strength as compared to Vitrebond (3M ESPE).","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"506 - 517"},"PeriodicalIF":1.2,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5157237","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

Isophorone Diisocyanate and Trimethylolpropane in-situ Prepared Hydroxyl-Terminated Block Copolymer Binder with Excellent Mechanical Properties 二异氰酸酯异佛酮与三甲基丙烷原位制备具有优异力学性能的端羟基嵌段共聚物粘合剂

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-05-30 DOI: 10.1134/S1560090422700117

Yue Zhao, Keke Chen, Yunjun Luo

{"title":"Isophorone Diisocyanate and Trimethylolpropane in-situ Prepared Hydroxyl-Terminated Block Copolymer Binder with Excellent Mechanical Properties","authors":"Yue Zhao, Keke Chen, Yunjun Luo","doi":"10.1134/S1560090422700117","DOIUrl":"10.1134/S1560090422700117","url":null,"abstract":"A novel hydroxyl-terminated block copolymer (ITPP) binder was prepared through an in-situ preparation method. The new binder having similar block structure as HTPE binder, without complex synthesis process to prepare HTPE prepolymer intermediate, reduces cost and optimizes the preparation process. Thus, it is expected to be used as binder of insensitive propellant. Infrared spectroscopy, low-field nuclear magnetic resonance, and uniaxial tensile testing were used to investigate the curing networks and mechanical properties of the binder. The crosslink density Ve increased with the increase of TMP content and R value. The ultimate tensile strength σm of the in-situ-prepared ITPP binder is 20.50 MPa and the percentage of breaking elongation εb is 743.47%. Additionally, in order to study the pot life of the in-situ-prepared ITPP binder, the rheological properties of the curing reactions were also studied. Finally, compared to HTPE binder, the in-situ-prepared ITPP binder’s strength and elongation increase by 694 and 276%, respectively. Besides, the in-situ-prepared ITPP binder has better process performance. This exciting result greatly enhances that the in-situ-prepared ITPP binder has great potential for application in rocket propellant formulations.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"382 - 392"},"PeriodicalIF":1.2,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5157251","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

Synthesis and Characterization of Ethylene Glycol-Polydimethylsiloxane-Polybutyl Methacrylate Copolymer 乙二醇-聚二甲基硅氧烷-聚甲基丙烯酸丁酯共聚物的合成与表征

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-05-30 DOI: 10.1134/S1560090422700142

Juan Chen, Xiaomei Zhang, Yuying Chen, Xing Lin, Yan Jiang, Hongwen Zhang, Hongbo Liu

{"title":"Synthesis and Characterization of Ethylene Glycol-Polydimethylsiloxane-Polybutyl Methacrylate Copolymer","authors":"Juan Chen, Xiaomei Zhang, Yuying Chen, Xing Lin, Yan Jiang, Hongwen Zhang, Hongbo Liu","doi":"10.1134/S1560090422700142","DOIUrl":"10.1134/S1560090422700142","url":null,"abstract":"<div><div><h3>\u0000 Abstract—</h3>In this article, the octamethylcyclotetrasiloxane is introduced into ethylene glycol. The reaction is terminated using acrylic acid to obtain a linear polydimethylsiloxane intermediate comprising double bonds at the ends. The targeted copolymer is prepared by copolymerizing polydimethylsiloxane intermediate and butyl methacrylate. Additionally, blended-porous film is prepared by adding the copolymer to the cyclodextrin copolymer. The results reveal that the thermal stability of the copolymer increases with the increase of the polydimethylsiloxane content. The ethanol solution of the copolymer of a certain formulation has temperature sensitivity. The contact angle hysteresis of cyclodextrin copolymer is larger on the inclined surface at five degrees from the horizontal, but the blended-porous films all have low contact angle hysteresis, and the minimum contact angle hysteresis decreased to 2°. The main reason for the observed difference is that the presence of the copolymer makes the surface morphology of the film changed greatly. The blended-porous films have a waterproof and easy-to-slide surface.</div></div>","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"429 - 444"},"PeriodicalIF":1.2,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5165485","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

Synthesis, Spectral and Thermal Characterization of 1,1-Bis(4-hydroxyphenyl)cyclohexane (BPZ)/1,1-Bis(4-hydroxyphenyl)-4-methylcyclohexane (MBPZ) Cardo Copolyesters 1,1-二(4-羟基苯基)环己烷(BPZ)/1,1-二(4-羟基苯基)-4-甲基环己烷(MBPZ) Cardo共聚酯的合成、光谱和热表征

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-05-30 DOI: 10.1134/S1560090422700129

Govindraj Latha, Mohamed Mydeen K, Arumugam Hariharan, Krishnasamy Balaji, Salem Chandrasekaran Murugavel

{"title":"Synthesis, Spectral and Thermal Characterization of 1,1-Bis(4-hydroxyphenyl)cyclohexane (BPZ)/1,1-Bis(4-hydroxyphenyl)-4-methylcyclohexane (MBPZ) Cardo Copolyesters","authors":"Govindraj Latha, Mohamed Mydeen K, Arumugam Hariharan, Krishnasamy Balaji, Salem Chandrasekaran Murugavel","doi":"10.1134/S1560090422700129","DOIUrl":"10.1134/S1560090422700129","url":null,"abstract":"A series of copolyesters containing cardo cyclohexane moiety in the main chain was synthesized from 1,1-bis(4-hydroxyphenyl)cyclohexane (BPZ)/1,1-bis(4-hydroxyphenyl)-4-methylcyclohexane (MBPZ) and bisphenol-A (BPA) with adipoyl chloride. The solubility of the copolyesters was tested in various solvents. The intrinsic viscosity of the synthesized copolyesters was determined by Oswald viscometer was found to be 0.33–0.48 g/dL. The molecular structures of the monomer and copolyesters were confirmed by Fourier transform infrared (FTIR), 1H NMR and 13C NMR spectral analyses. The thermal properties were studied with thermogravimetric analyses (TGA) and differential scanning calorimetry (DSC). The TGA data revealed that the copolyesters were stable up to 210°C and start degrading thereafter. The solubility and thermal stability of the synthesized polymer are enhanced due to the introduction of cardo cyclohexane ring into the polymer chain backbone. The self-extinguishing property of the synthesized copolyesters was studied by the determination of limiting oxygen index (LOI) values using van Krevelen’s equation.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"445 - 453"},"PeriodicalIF":1.2,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5165486","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

Effect of Processing Temperature on the Thermal and Mechanical Properties of BPDA–PDA 加工温度对BPDA-PDA热学和力学性能的影响

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-05-30 DOI: 10.1134/S1560090422700105

Peng Jun, Wang Jin, Yang Jun, Zeng Guangsheng

{"title":"Effect of Processing Temperature on the Thermal and Mechanical Properties of BPDA–PDA","authors":"Peng Jun, Wang Jin, Yang Jun, Zeng Guangsheng","doi":"10.1134/S1560090422700105","DOIUrl":"10.1134/S1560090422700105","url":null,"abstract":"High heat resistant and stable dimensional PI films have been widely used in organic light emitting diode industry, therefore the comprehensive performance should be enhanced. The PI films of low CTE and high heat resistance were prepared with 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) and p-phenylenediamine (PDA) under different processing conditions. WAXD and FTIR were performed to characterize the microstructure of the films. DMA and TMA were conducted to investigate the mechanical and thermal properties of the films. The results showed that the density of the films increased and water absorption rate decreased with fabrication temperature as a result of the smectic structure. The smectic structure of the film attributed to the oriented polymer chains was observed in the DMA curves peaked at 470°C. The film would shrink at round the glass transition temperature as indicated by the TMA curves when it was prepared at relatively lower fabrication temperature, resulting in a larger CTE value compared with other prepared at high fabrication temperature. The 1% weight loss temperature increased with the fabrication temperature for the smectic structure. The tensile strength and elongation at break of the film increased with smectic density. The heat resistance and mechanical performance of bioriented films were the best among all the samples as the PI chains were stretched during the imidization process when all the edges of the film were fixed. The results obtained in this paper could offer practical and valuable references to optimization of processing parameters for the preparation of high performance PI films.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 4","pages":"518 - 525"},"PeriodicalIF":1.2,"publicationDate":"2022-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5161234","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

Structural, Thermal and Electrochemical Behavior of Poly(2-ethylaniline)-nanocomposite-Fe2O3 and Poly(2-ethylaniline)-nanocomposite-SiO2 for Antibacterial and Antioxidant Studies 聚(2-乙基苯胺)-纳米复合材料fe2o3和聚(2-乙基苯胺)-纳米复合材料sio2的结构、热及电化学行为研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-04-29 DOI: 10.1134/S1560090422200040

Julia Sebastian, S. Jhancy Mary

{"title":"Structural, Thermal and Electrochemical Behavior of Poly(2-ethylaniline)-nanocomposite-Fe2O3 and Poly(2-ethylaniline)-nanocomposite-SiO2 for Antibacterial and Antioxidant Studies","authors":"Julia Sebastian, S. Jhancy Mary","doi":"10.1134/S1560090422200040","DOIUrl":"10.1134/S1560090422200040","url":null,"abstract":"Poly(2-ethylaniline) (PEAN), poly(2-ethylaniline)-nanocomposite-Fe2O3 (PEAN/Fe2O3) and poly(2-ethylaniline)-nanocomposite-SiO2 (PEAN/SiO2) are synthesized by emulsion polymerization and characterized by UV–Visible, FTIR spectroscopy, Powder XRD, TGA, DTA, and SEM-EDX. The nanocomposites are amorphous and exhibit a three-step thermal degradation corresponding to the loss of moisture, loss of dopant, and the decomposition of the polymer composites. The electrical conductivity of the semi-conducting emeraldine salt forms of PEAN, PEAN/Fe2O3 and PEAN/SiO2 doped with chloride ions and camphor sulphonate ions are 4.3 × 10–4, 3.6 × 10–5, and 4.8 × 10–3 S/cm respectively. PEAN, PEAN/Fe2O3 and PEAN/SiO2 show excellent antibacterial activity against the gram-positive bacteria Staphylococcus aureus, moderate activity against Salmonella typhi and Klebsiella pneumoniae, and weak activity against Bacillus subtilis and Enterococcus faecalis. These materials are inactive against Escherichia coli. The destruction of the bacterial cell membranes due to the stronger interaction between the doped polycation chains and the negatively charged bacterial cell wall, and the release of Fe3+ ions due to electrostatic interaction facilitates the binding to the negatively charged bacterial cell membrane. The large surface area and the high content of SiOH groups in nanoporous silica facilitates the attachment with the surface of the bacterial cell walls. The nanocomposites demonstrate relatively good free radical scavenging activity at a concentration of 50 µL.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 3","pages":"340 - 353"},"PeriodicalIF":1.2,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5105694","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

Facile Fabrication of Hollow Molecularly Imprinted Polymer Latex Particles for Dibutyl Phthalate via One-step Miniemulsion Polymerization 一步微乳液聚合制备邻苯二甲酸二丁酯中空分子印迹聚合物乳胶颗粒

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-04-29 DOI: 10.1134/S1560090422200076

Zehu Wang, Junxian Hou, Zongqi Li, Ruiye Yan, Xiying Fu, Guangshuo Wang, Yanming Wang, Xiaoliang Zhang

{"title":"Facile Fabrication of Hollow Molecularly Imprinted Polymer Latex Particles for Dibutyl Phthalate via One-step Miniemulsion Polymerization","authors":"Zehu Wang, Junxian Hou, Zongqi Li, Ruiye Yan, Xiying Fu, Guangshuo Wang, Yanming Wang, Xiaoliang Zhang","doi":"10.1134/S1560090422200076","DOIUrl":"10.1134/S1560090422200076","url":null,"abstract":"The meticulous design on the structure of molecularly imprinted polymers has aroused increasing concern because of their excellent recognition precision. Here, we report a straightforward miniemulsion strategy to fabricate the hollow molecularly imprinted polymers latex particles for the recognition of dibutyl phthalate. The hollow structure originated from the cross-linking reaction combined with the polymerization induced phase separation occurring within miniemulsion droplets. The morphology and internal structure of latex particles were observed with the aid of field emission scanning electron microscope and transmission electron microscope, respectively. The formation mechanism of hollow structure was discussed in detail. Besides, the binding property of latex particles was evaluated by the binding kinetics, binding isotherm and special recognition. The results indicate that hollow molecularly imprinted polymers latex particles exhibit remarkable binding kinetics property because of low mass transfer resistance and desirable selectivity towards dibutyl phthalate. The prepared latex particles have broad application prospects in environmental field.","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 3","pages":"332 - 339"},"PeriodicalIF":1.2,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5109724","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

Investigation of Inverse Emulsion Copolymerization Kinetics of Acrylamide and Sodium 2-Acrylamido-2-methylpropanesulfonate 丙烯酰胺与2-丙烯酰胺-2-甲基丙磺酸钠乳液反聚合动力学研究

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-04-29 DOI: 10.1134/S1560090422200064

A. I. Nechaev, N. S. Voronina, V. N. Strel’nikov, V. A. Val’tsifer

引用次数: 0

Novel Biocomposites Based on El Retma Natural Fiber and PLA/PC Mixture Compatibilized Using Samarium Acetylacetonate Catalyzed Interchange Reactions 基于El Retma天然纤维和PLA/PC混合物的新型生物复合材料，采用乙酰丙酮钐催化交换反应

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-04-29 DOI: 10.1134/S1560090422200052

Ali Larous, Melia Guessoum, Sorya Nekkaa, Magali Fois

{"title":"Novel Biocomposites Based on El Retma Natural Fiber and PLA/PC Mixture Compatibilized Using Samarium Acetylacetonate Catalyzed Interchange Reactions","authors":"Ali Larous, Melia Guessoum, Sorya Nekkaa, Magali Fois","doi":"10.1134/S1560090422200052","DOIUrl":"10.1134/S1560090422200052","url":null,"abstract":"<div><div><h3>\u0000 Abstract—</h3>In this work, the properties of biocomposites based on poly(lactic acid)/polycarbonate (PLA/PC) mixture and a flour obtained from a local plant which is El Retma (RET) are investigated. Due to the incompatibility of PLA/PC matrix, a transesterification catalyst which is samarium acetylacetonate (Sm) is added to promote interchange reactions and synthesize PLA-PC copolymer at the interface between the polymers. Furthermore, to improve adhesion of the natural fiber to the matrix, RET flour has been pretreated using an alkaline solution before treatment with maleic anhydride (MA). Also, to point out the effect of the rate of MA grafting and RET flour size, the properties of biocomposites based on MA-RET flours with flour sizes below 100 and 50 µm are compared. The composites with mixing time varying from 10 and 20 min have also been studied because they are expected to present different performances due to the different extents of catalyzed transesterification reactions. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis attested for the grafting of maleic anhydride grafting after the observation of carbonyl group band in FTIR spectra of MA-RET flour and the improvement of its thermal stability compared to the pretreated flour. The composite PLA/PC/Sm/MA-RET melt mixed during 20 min revealed better impact resistance, thermal stability and storage modulus due to the eventual higher concentration of PLA-PC copolymer and grafting of PLA and PC chains on the flour.</div></div>","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 3","pages":"313 - 325"},"PeriodicalIF":1.2,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5104980","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

Spectral Manifestation of Positive and Negative Photochromism in Polylactide Layers 聚乳酸层正、负光致变色的光谱表现

IF 1.2 4区化学

Polymer Science, Series B Pub Date : 2022-04-29 DOI: 10.1134/S1560090422200039

S. S. Golubkov, O. V. Baranov, V. V. Istratov, T. M. Valova, V. A. Barachevskii

引用次数: 0