Polymer最新文献_第9页

Boric acid bridged cyclodextrins-based polymers for selective adsorption of binary dyes

IF 4.1 2区化学

Polymer Pub Date : 2025-01-28 DOI: 10.1016/j.polymer.2025.128091

Yangyang Zheng , Huacheng Zhang

{"title":"Boric acid bridged cyclodextrins-based polymers for selective adsorption of binary dyes","authors":"Yangyang Zheng , Huacheng Zhang","doi":"10.1016/j.polymer.2025.128091","DOIUrl":"10.1016/j.polymer.2025.128091","url":null,"abstract":"<div><div>Organic aerogel has attracted much attention these days due to its wide applications to multiple daily fields. Except for designing processing procedures, we focused on enhancing the hierarchical porosities by introducing cavities of cyclodextrins (CDs) here in polymeric networks crosslinked by boric acid (BA). As confirmed by a series of instrumental analyses such as FT-IR, XRD, SEM, BET, EDS, XPS and ζ potential, BA was successfully employed as the “bridge-like” moieties to connect independent CDs subunits together for affording CDs-based polymers (BA-CD) via the one-step method in aqueous solutions. Particularly, BA-CD exhibited expected selective capacity during the experiment of competitive adsorption by fully using diverse porosities generated by both polymeric networks and the host cavities. Theoretical calculations were further performed to model the possible monomeric structure in BA-CD, and the diverse behaviors in host-guest inclusion towards targeted organic dyes by using CD and BA-mono-bridged CD dimeric structure, indicating that both molecular recognition of CD cavity and synergistic cooperation among crosslinked CD moieties play significant roles in selectively absorbing binary dyes.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128091"},"PeriodicalIF":4.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 free-volume holes on mechanical properties of carbon-fiber-reinforced polymers (CFRPs) studied by positron annihilation age-momentum correlation spectroscopy

IF 4.1 2区化学

Polymer Pub Date : 2025-01-27 DOI: 10.1016/j.polymer.2025.128076

M. Luo , F. Wei , C. Jiang , J.H. Zhang , W. Xu , J.D. Liu , B.J. Ye , H.J. Zhang

{"title":"Effect of free-volume holes on mechanical properties of carbon-fiber-reinforced polymers (CFRPs) studied by positron annihilation age-momentum correlation spectroscopy","authors":"M. Luo , F. Wei , C. Jiang , J.H. Zhang , W. Xu , J.D. Liu , B.J. Ye , H.J. Zhang","doi":"10.1016/j.polymer.2025.128076","DOIUrl":"10.1016/j.polymer.2025.128076","url":null,"abstract":"<div><div>To improve the mechanical properties of carbon-fiber-reinforced polymers (CFRPs), various factors of microstructure were investigated, but the effect of free-volume holes was rarely studied. In this work, a series of CFRPs which were prepared from DGEBA (diglycidyl ether of Bisphenol A) epoxy resin and treated carbon fibers (TCF), were characterized by positron annihilation age-momentum correlation (AMOC) spectroscopy experiments to reveal their free-volume hole properties. The results of the <span><math><mrow><mi>S</mi><mrow><mo>(</mo><mi>t</mi><mo>)</mo></mrow></mrow></math></span> parameter indicate that CFRPs and the DGEBA matrix have similar free-volume environments, which are primarily governed by the free-volume of DGEBA and the carbon fiber/matrix interface. From the positron annihilation lifetime (PAL) spectra derived from AMOC data, with increase of TCF content, CFRPs exhibit similar free-volume hole size, narrower hole size distribution, and lower fractional free-volume (FFV). To characterize the interfacial interaction between matrix and TCF for each sample, a parameter <span><math><mi>β</mi></math></span> was calculated from PAL spectra results. Eventually, for TCF contents in the range from 39 to 58 wt%, five mechanical parameters (tensile strength, tensile modulus, flexural strength, flexural modulus, and shear modulus) are almost linearly and negatively correlated with both relative fractional free-volume (FFV<sub>r</sub>) and interfacial interaction parameter (<span><math><mi>β</mi></math></span>). This work provides a specific free-volume perspective to understand the macroscopic mechanical properties of CFRPs.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128076"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Enhancing degradation resistance of polyglycolic acid through stereocomplex polylactic acid integration: A novel “stereo-lock” approach

IF 4.1 2区化学

Polymer Pub Date : 2025-01-27 DOI: 10.1016/j.polymer.2025.128088

Huashuai Cui , Zetian Zhang , Qing Huang

{"title":"Enhancing degradation resistance of polyglycolic acid through stereocomplex polylactic acid integration: A novel “stereo-lock” approach","authors":"Huashuai Cui , Zetian Zhang , Qing Huang","doi":"10.1016/j.polymer.2025.128088","DOIUrl":"10.1016/j.polymer.2025.128088","url":null,"abstract":"<div><div>The increasing concerns over pollution from non-degradable plastics are prompting a quest for sustainable alternatives. Polyglycolic acid (PGA), known for its good biocompatibility and high mechanical strength, faces limited applications due to its uncontrollable degradation rate. This article introduces an effective approach to enhance the shelf life of PGA by constructing a novel “<em>stereo-lock</em>” structure. Stereocomplex polylactic acid (ScPLA) is first disassembled and fixed to the amorphous region of PGA by melt spinning. Later, an annealing process enhances molecular chain mobility, leading to the reformation of ScPLA and the locking of entangled PGA amorphous molecular chains, resulting in the formation of “<em>stereo-lock</em>” configurations. Thus, molecular chain density in the amorphous area increases, which reduces the accessibility of water to ester bonds and is conducive to improving the degradation resistance of PGA. As a result, compared to pure PGA, the rate of degradation of the monofilament possessing “<em>stereo-lock</em>” structure is noticeably slower. Specifically, by the seventh day of the accelerated degradation tests, the weight loss of the PGA monofilament dropped from 61.4 % to 48.4 % in the monofilament with “<em>stereo-lock</em>”. Furthermore, the formation mechanism of the “<em>stereo-lock</em>” was confirmed through a series of investigations and analyses. The structure-property relationship between molecular chain entanglement and degradation properties of PGA was studied systematically in this study, which also offers fresh perspectives on how to control the degradation characteristics of other polymers.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"321 ","pages":"Article 128088"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Preparation and characterization of organosilicon RAFT-modified anionic surface sizing agents

IF 4.1 2区化学

Polymer Pub Date : 2025-01-27 DOI: 10.1016/j.polymer.2025.128086

Qiwei Yu , Jue Bai

{"title":"Preparation and characterization of organosilicon RAFT-modified anionic surface sizing agents","authors":"Qiwei Yu , Jue Bai","doi":"10.1016/j.polymer.2025.128086","DOIUrl":"10.1016/j.polymer.2025.128086","url":null,"abstract":"<div><div>Novel anionic surface sizing agents were innovatively prepared to improve the compatibility of macromolecular silicones with acrylates and to enhance the performance of paper. In this paper, a novel anionic surface sizing agent was synthesized for the first time by using a silicon-based RAFT reagent (RAFT-PDMS) with acrylic resin and diacetone acrylamide (DAAM). Specifically, DAAM and acrylate monomers are introduced by reversible addition-breakage chain transfer (RAFT) polymerization and cross-linked with adipic dihydrazide (ADH) to obtain sizing emulsions. The properties and characteristics of the emulsions and latexes were analyzed by laser particle size analyzer, transmission electron microscope, rheometer and differential scanning calorimeter. The results indicated that the increase of RAFT-PDMS content was able to reduce the particle size from 119.5 nm to 57.98 nm and the glass transition temperature (Tg) from 48.3 °C to 42.3 °C. Then, the silicone modified emulsions were mixed with starch to obtain surface sizing agents (PDMS-Y-PA) with excellent properties. The increase of RAFT-PDMS content was further verified by gloss meter, 3D profilometer and scanning electron microscope observation to improve the gloss of paper surface and reduce the surface roughness. In addition, we confirmed the excellent hydrophobic properties of PDMS-Y-PA sizing paper by contact angle and Cobb value measurements. The Cobb value of the paper was reduced by 33.28 % and the contact angle increased from 83.9° to 111.7°. Finally, we compared the mechanical strength of the base paper with that of the sizing paper. The folding resistance, bursting strength and ring compression index of the sized paper all showed great improvement, and the tensile strength increased by 197 %. This modified anionic surface sizing agent enhances the water resistance and mechanical properties of paper on the basis of safeguarding paper properties and has great application prospects.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128086"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Dynamics of hydrogen-bonded polymer complexes of poly(ether oxide) and poly(acrylic acid): time-humidity-temperature equivalence

IF 4.1 2区化学

Polymer Pub Date : 2025-01-27 DOI: 10.1016/j.polymer.2025.128080

Zexin Liu, Hao Huang, Peiyang Yin, Caihong Zhang, Shuguang Yang

{"title":"Dynamics of hydrogen-bonded polymer complexes of poly(ether oxide) and poly(acrylic acid): time-humidity-temperature equivalence","authors":"Zexin Liu, Hao Huang, Peiyang Yin, Caihong Zhang, Shuguang Yang","doi":"10.1016/j.polymer.2025.128080","DOIUrl":"10.1016/j.polymer.2025.128080","url":null,"abstract":"<div><div>The dynamics of polymer complexes over long-time scales are critical for their applications across various fields. Humidity is a very important environmental parameter and its coupling with temperature significantly affects the performance of polymer complex materials. However, the understanding of humidity effect on hydrogen-bonded polymer complex is poor and the quantitative studies are lacking. Here, we investigate the static and dynamic mechanical properties of hydrogen-bonded polymer complexes of poly(ethylene oxide) (PEO) and poly(acrylic acid) (PAA) and its reinforced derivatives under different humidity and temperature. When PEO/PAA complexes are reinforced through covalent cross-linking and coordination, both the humidity-induced glass transition and the glass transition temperature (<em>T</em><sub>g</sub>) increase. The equilibrium water uptake as a function of relative humidity (RH) shows two distinct trends, and the trend transition corresponds to the humidity-induced glass transition. Time-humidity equivalence and time-temperature equivalence are applied separately to construct the master curves. The temperature-dependent shift factor (<em>a</em><sub>T</sub>) is fitted to Arrhenius and Williams-Landel-Ferry (WLF) equations before and after <em>T</em><sub>g</sub>, respectively. Instead of the value of RH, the equilibrium water ratio in the polymer complex is used to describe humidity-dependent shift factor (<em>a</em><sub>W</sub>), which fits two log-linear equations before and after humidity-induced glass transition. Furthermore, we combine humidity and temperature to do superposition to build the master curve of much longer timescale, and propose a coefficient (<em>f</em><sub>c</sub>) to describe how the temperature and humidity working together and coupling effect.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128080"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Computational study of active polar polymer melts: From active reptation to activity induced local alignment

IF 4.1 2区化学

Polymer Pub Date : 2025-01-25 DOI: 10.1016/j.polymer.2025.128074

Javier Oller-Iscar , Andrés R. Tejedor , Marisol Ripoll , Jorge Ramírez

{"title":"Computational study of active polar polymer melts: From active reptation to activity induced local alignment","authors":"Javier Oller-Iscar , Andrés R. Tejedor , Marisol Ripoll , Jorge Ramírez","doi":"10.1016/j.polymer.2025.128074","DOIUrl":"10.1016/j.polymer.2025.128074","url":null,"abstract":"<div><div>This work investigates the effects of tangent polar activity on the conformational and dynamic properties of entangled polymer melts through Langevin molecular dynamics simulations. We examine systems composed of all self-propelled, monodisperse linear chains, so that constraint release is considered. The range of activities explored here includes values where the active reptation theory is applicable, as well as higher activities that challenge the validity of the theory. Chain conformations exhibit a moderate increase in coil size increase, which becomes more pronounced at higher activity levels. Under these conditions, a local bond alignment along the chain contour appears together with a non-homogeneous segmental stretching, and orientation and stretching of the tube. Dynamically, polar activity induces a molecular-weight-independent diffusion coefficient, a transient superdiffusive behavior, and an end-to-end relaxation time inversely proportional to the molecular weight. Finally, our results are summarized in a diagram that classifies the various regimes of behavior observed in the simulations. Overall, these findings provide valuable insights into the complex interplay between activity and entanglements, advancing our understanding of active polymer systems and their potential applications across various fields.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128074"},"PeriodicalIF":4.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Easy synthesis of self-healing thermoplastic elastomer (TPE) via functionalization of styrene block copolymer (SEBS) with a cyclic amine compound in melt state and rheological assessment of non-covalent dynamic interactions

IF 4.1 2区化学

Polymer Pub Date : 2025-01-25 DOI: 10.1016/j.polymer.2025.128083

Mine Begum Alanalp, Ali Durmus

{"title":"Easy synthesis of self-healing thermoplastic elastomer (TPE) via functionalization of styrene block copolymer (SEBS) with a cyclic amine compound in melt state and rheological assessment of non-covalent dynamic interactions","authors":"Mine Begum Alanalp, Ali Durmus","doi":"10.1016/j.polymer.2025.128083","DOIUrl":"10.1016/j.polymer.2025.128083","url":null,"abstract":"<div><div>In this study, an amine functionalized thermoplastic elastomer was easily synthesized by a semi-batch reactive melt compounding method in an internal mixer at 165 °C using maleic anhydride grafted styrene-<em>block</em>-ethylene/butylene-<em>block</em>-styrene copolymer (SEBS-g-MAh) as elastomer phase and 3-amino-1,2,4-triazole (TA) as cyclic amine compound. Then a metal salt, zinc nitrate (Zn(NO<sub>3</sub>)<sub>2</sub>), was introduced into the melt mixer to form metal-ligand interactions between amine functionalized TPE. Structural, mechanical, rheological, and viscoelastic properties of functional TPE were characterized by various analytical methods such as FTIR, DMA, rotational rheometer, and tensile test. FTIR analysis confirmed that the primary amine groups of cyclic amine compound reacted with maleic anhydride of SEBS-g-MAh to form maleimid groups. Formation of metal-ligand interactions in the modified TPE structure was also shown with various rheological measurements such as strain-dependent, frequency-dependent, and time-dependent test procedures and different mathematical models. It was shown that the strong metal-ligand interactions provided the modified TPE, temperature-induced self-healing property.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128083"},"PeriodicalIF":4.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Coarse-grained molecular dynamics simulations of nano-deformation behavior of epoxy adhesives’ interface during atomic force microscopy (AFM) mechanical testing

IF 4.1 2区化学

Polymer Pub Date : 2025-01-25 DOI: 10.1016/j.polymer.2025.128071

Masayoshi Ogawa, Ayumu Morimura, Ikko Haba, Akio Yonezu

{"title":"Coarse-grained molecular dynamics simulations of nano-deformation behavior of epoxy adhesives’ interface during atomic force microscopy (AFM) mechanical testing","authors":"Masayoshi Ogawa, Ayumu Morimura, Ikko Haba, Akio Yonezu","doi":"10.1016/j.polymer.2025.128071","DOIUrl":"10.1016/j.polymer.2025.128071","url":null,"abstract":"<div><div>Adhesive interfaces with epoxy resin (adhesive joints and composites) play a critical role in bulk mechanical properties (e.g., load transfer), and it is important to elucidate the strength development mechanism near adhesive interfaces. However, the mechanical properties of epoxy resins on adhesive interfaces are known to be different from those of bulk resin and macroscopic adhesive interfaces because of a difference in the cross-linking ratio of epoxy resin. Since it is difficult to clarify the cross-linking ratio near the adhesive interface and to measure mechanical properties, it is important to establish nano-mechanical testing and simulation methods that can investigate mechanical properties and molecular structure around an adhesive interface. In this study, nanoindentation tests using atomic force microscopy (AFM) and molecular dynamics (MD) simulations that can reproduce the AFM tests were conducted on two-component epoxy resins to clarify the mechanical properties near the nanoscale adhesive interface and to investigate the mechanism of adhesive strength development. MD simulations employed a coarse-graining method that extends the spatial scale to cover the experimental scale of AFM nanoindentation. Furthermore, the mechanical properties of the adhesive interface were investigated from the viewpoint of deformation of molecular chains. It was found that at the interface, nanoindentation showed deformation in the adhesive due to reduction of cross-linking ratio. Coarse-grained (CG) MD simulations also simulated such deformation behavior in order to discuss molecular chain structure in deformation.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128071"},"PeriodicalIF":4.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Adsorption and diffusion of a polymer chain within a thin slit composed of two patch-patterned surfaces

IF 4.1 2区化学

Polymer Pub Date : 2025-01-25 DOI: 10.1016/j.polymer.2025.128084

Pu Zhou , Hao-Nan Zhang , Guo-Ao Wang , Qing-Hui Yang , Hang-Kai Qi , Meng-Bo Luo

{"title":"Adsorption and diffusion of a polymer chain within a thin slit composed of two patch-patterned surfaces","authors":"Pu Zhou , Hao-Nan Zhang , Guo-Ao Wang , Qing-Hui Yang , Hang-Kai Qi , Meng-Bo Luo","doi":"10.1016/j.polymer.2025.128084","DOIUrl":"10.1016/j.polymer.2025.128084","url":null,"abstract":"<div><div>The adsorption and diffusion behaviors of a polymer chain within a narrow slit composed of two patch-patterned surfaces is studied using Langevin dynamics simulations. The surfaces consist of a neutral area interspersed with periodic attractive patches of size <em>L</em> and period <em>d</em>. The mismatch of the upper and lower surfaces is denoted by Δ<em>x</em> and Δ<em>y</em> along <em>x-</em> and <em>y-</em>directions. For both the perfectly matched system (Δ<em>x</em> = Δ<em>y</em> = 0) and the mismatched system (Δ<em>x</em> = 0.5<em>d</em>, Δ<em>y</em> = 0) with moderate sized patches, the polymer chain mainly adopts an upper-lower adsorption state, i.e., it is adsorbed on both surfaces simultaneously. However, for the mismatched system with Δ<em>x</em> = Δ<em>y</em> = 0.5<em>d</em>, a single-surface adsorption state where the polymer is adsorbed on only one surface is primarily observed. On the other hand, the polymer chain does not undergo diffusion in the matched case, but exhibits normal diffusion on a long time scale in mismatched cases. The translational diffusion coefficient increases when the patch mismatch changes from Δ<em>x</em> = 0.5<em>d</em>, Δ<em>y</em> = 0 to Δ<em>x</em> = Δ<em>y</em> = 0.5<em>d</em>, which is attributed to an increased frequency of changes in the adsorption state. The polymer chain diffuses via a patch-exchange mode, that is, it exchanges patches between an upper-lower adsorption state and a single-surface adsorption state. The effect of patch period and slit height is also studied. These findings underscore the pivotal role of patch mismatch in modulating polymer adsorption and diffusion behaviors.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128084"},"PeriodicalIF":4.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

One-pot solvent-free synthesis of self-catalyzed phosphorus/silicon cycloaliphatic epoxy resin with excellent flame-retardant and dielectric property

IF 4.1 2区化学

Polymer Pub Date : 2025-01-25 DOI: 10.1016/j.polymer.2025.128087

Yonghao Lv, Hongyan Li, Zhu-Bao Shao, Zhiming Jiang

{"title":"One-pot solvent-free synthesis of self-catalyzed phosphorus/silicon cycloaliphatic epoxy resin with excellent flame-retardant and dielectric property","authors":"Yonghao Lv, Hongyan Li, Zhu-Bao Shao, Zhiming Jiang","doi":"10.1016/j.polymer.2025.128087","DOIUrl":"10.1016/j.polymer.2025.128087","url":null,"abstract":"<div><div>Developing superior flame-retardant and low dielectric epoxy resins used in electronics remains a great challenge. Herein, two cycloaliphatic epoxy molecules (CFP, CFDP) were designed by incorporating phosphaphenanthrene (DOPO) into a cyclic silicon resin (CFS) through one-pot solvent-free process. CFP and CFDP exhibited self-catalyzed ability toward anhydride hardener (MHHPA). Both CFP/MHHPA and CFDP/MHHPA resins achieved UL-94 V-0 rating with limited oxygen index of 26.5 % and 36.5 % owning to the emission of silicon/phosphorus-containing segments in gas phase and enhancement of carbonation ability. Moreover, incorporating DOPO well-maintained the thermal stability and enhanced char yield in air, thus significantly suppressing heat release during combustion. Meanwhile, CFP and CFDP imparted epoxy resins with excellent dielectric properties. The dielectric loss of CFP/MHHPA and CFDP/MHHPA was 0.005 and 0.006 at 10 MHz, and dielectric constant was remained at 3.36. This work offers a facile and practical way to fabricate multifunctional epoxy resins used in electronic field.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"320 ","pages":"Article 128087"},"PeriodicalIF":4.1,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143031186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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