Polymer最新文献_第10页

Polysulfone membranes with natural additives for water purification: Fabrication and performance testing 水净化用天然添加剂聚砜膜：制备及性能测试

IF 4.5 2区化学

Polymer Pub Date : 2025-09-13 DOI: 10.1016/j.polymer.2025.129070

Jweshvari Vidyadhar Tupe , S.M. Khot , Divya Padmanabhan , Bindu Rajaguru

{"title":"Polysulfone membranes with natural additives for water purification: Fabrication and performance testing","authors":"Jweshvari Vidyadhar Tupe , S.M. Khot , Divya Padmanabhan , Bindu Rajaguru","doi":"10.1016/j.polymer.2025.129070","DOIUrl":"10.1016/j.polymer.2025.129070","url":null,"abstract":"<div><div>The water scarcity is a leading problem all around the world. It occurs due to the increasing demand for clean water and depleting fresh water on earth. Water scarcity affects various aspects of human and animal life. The solution to reduce the burden on fresh water on earth is to purify the water available. Water purification leads to remove harmful contaminants from water and makes water useable for day-to-day human activities. The market of membrane technology is growing faster in this field. The main reason is less consumption of energy and scalability. The contaminant removal depends on the type of membranes and the pore size of membranes used. This study focuses on identifying appropriate materials for membranes and additives for cost-effective water filtration systems. Polysulfone (psf) beads are used as a base polymer, n-methyl-2-pyrrolidone (NMP), the solvent; and polyvinylpyrrolidone (PVP), the pore former. The additives used were date palm powder and banana leaf powder. Various compositions of dope solutions were prepared for each additive. The membranes were tested for water flux, thickness, hydrophilicity, pore size, porosity, antifouling capacity, and mechanical strength. The comparison showed that, the membrane with 0.15 %wt of banana leaf powder has given highest water permeability, porosity, antifouling capability, and mechanical strength. The pore size of these membranes is less than the most commonly found bacteria in water i.e. E. Coli. These membranes are also suitable for high pressure and temperature environmental conditions.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129070"},"PeriodicalIF":4.5,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043833","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

Structural evolution of poly(glycolide-co-lactide) under stress-temperature coupled fields based on in-situ WAXD/SAXS 基于原位WAXD/SAXS的应力-温度耦合场下聚乙二醇-共丙交酯的结构演化

IF 4.5 2区化学

Polymer Pub Date : 2025-09-13 DOI: 10.1016/j.polymer.2025.129091

Yiru Shan , Jin Guo , Yiguo Li, Weijun Miao, Zongbao Wang

{"title":"Structural evolution of poly(glycolide-co-lactide) under stress-temperature coupled fields based on in-situ WAXD/SAXS","authors":"Yiru Shan , Jin Guo , Yiguo Li, Weijun Miao, Zongbao Wang","doi":"10.1016/j.polymer.2025.129091","DOIUrl":"10.1016/j.polymer.2025.129091","url":null,"abstract":"<div><div>As one of the most promising biodegradable polymeric materials, P(GA<em>-co-</em>LA) has become a hot research topic due to its excellent biocompatibility, tunable degradation properties and good mechanical performance. In this study, the synchrotron in-situ WAXD/SAXS techniques were employed to systematically investigate the evolution of the aggregated state structure of highly crystalline P(GA<em>-co-</em>LA) with an LA content of 8 mol% during hot-stretching at temperatures ranging from 50 °C to 150 °C. The research results indicate that the initial eutectic structure of P(GA<em>-co-</em>LA) significantly influences its stretching-induced structural evolution, exhibiting distinct temperature-dependent structural evolution characteristics: under low-temperature (50–70 °C) stretching conditions, crystal slip and fragmentation dominate, leading to a significant reduction in crystallite size; whereas under high-temperature (120–150 °C) conditions, enhanced molecular chain mobility promotes the formation of stress-induced highly oriented crystals. Notably, unlike the homopolymer PGA, P(GA<em>-co-</em>LA) does not exhibit significant cavitation during stretching at 70–150 °C, which is mainly attributed to the disruptive effect of LA units on the homogeneity of the amorphous regions. Moreover, under high-temperature stretching conditions, the free energy for the exclusion of LA units from the lattice decreases, and the increase in the unit cell parameter <em>b</em> is significantly reduced, indicating that the highly oriented crystalline structure effectively inhibits the reincorporation of LA units.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129091"},"PeriodicalIF":4.5,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043834","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

Rapid photo-crosslinkable pectin methacrylate reinforced self-healing adhesive hydrogels 快速光交联的甲基丙烯酸果胶增强自愈胶粘剂水凝胶

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129090

Nisha Arunachalam , Rajkamal Balu , Jitraporn Vongsvivut , Naba Kumar Dutta , Namita Roy Choudhury

{"title":"Rapid photo-crosslinkable pectin methacrylate reinforced self-healing adhesive hydrogels","authors":"Nisha Arunachalam , Rajkamal Balu , Jitraporn Vongsvivut , Naba Kumar Dutta , Namita Roy Choudhury","doi":"10.1016/j.polymer.2025.129090","DOIUrl":"10.1016/j.polymer.2025.129090","url":null,"abstract":"<div><div>Acrylic acid-based hydrogels are promising candidates for tissue engineering due to their pH responsiveness and bio-adhesive properties. However, several limitations, must be addressed to enhance their biomedical applications. These include poor mechanical strength, excessive swelling behaviour, and the potential for inflammation when used as standalone scaffolds. In this study, we functionalized natural polysaccharide, pectin with methacrylate groups and utilized it as a reinforcing agent. We then synthesized pectin methacrylate-reinforced self-healing acrylic acid hydrogels through a one-pot rapid photochemical reaction. The hybrid hydrogels were optimized for crosslink density, water swelling, morphological characteristics, rheological behaviour, mechanical properties, viscoelasticity, and adhesion properties. Additionally, we employed synchrotron macro-attenuated total reflection-Fourier transform infrared micro-spectroscopy to investigate the chemical heterogeneity, interfacial interactions, and morphological organization within the hydrogels. The developed hydrogels possess exceptional attributes that have significant potential for advancing tissue engineering, optimizing drug delivery systems, and enhancing biosensor technology.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129090"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043500","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

Structure–property modulation in multiblock Poly(l-lactide-co-ethylene brassylate) copolymers and their stereocomplexed blends with Poly(d-lactide) 多嵌段聚l -丙交酯-共聚物及其与聚d -丙交酯立体配位共混物的结构-性能调制

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129087

Mohammad Raef , Julia Kapalka , Agustin Etxeberria , Jone M. Ugartemendia

{"title":"Structure–property modulation in multiblock Poly(l-lactide-co-ethylene brassylate) copolymers and their stereocomplexed blends with Poly(d-lactide)","authors":"Mohammad Raef , Julia Kapalka , Agustin Etxeberria , Jone M. Ugartemendia","doi":"10.1016/j.polymer.2025.129087","DOIUrl":"10.1016/j.polymer.2025.129087","url":null,"abstract":"<div><div>Copolymerization offers an effective alternative to physical blending for modulating polylactide (PLA) stereocomplexation and thermomechanical properties, primarily due to its ability to suppress microphase separation. In this study, we investigate the impact of ethylene brassylate (EB) incorporation in multiblock poly(<span>l</span>-lactide-co-ethylene brassylate) copolymers (PLEBs) across a range of LLA:EB ratios (100:0 to 60:40), as well as their stereocomplexed blends with poly(<span>d</span>-lactide) (SC-PLEBs). Comprehensive structural, thermal, and mechanical characterization was performed using nuclear magnetic resonance, gel permeation chromatography, differential scanning calorimetry, X-ray diffraction, thermal gravimetric analysis, tensile and dynamic mechanical analysis. We demonstrate that EB copolymerization significantly influences stereocomplex crystal formation and thermomechanical performance. Notably, the PLEB60/PDLA blend (SC60), containing about 50 % EB segments, achieved a stereocomplexation degree above 80 %, resulting in a 75 % increase in modulus compared to its corresponding copolymer (PLEB60), and an additional 500 MPa over the SC100 (PLLA/PDLA) blend allowing us to control the mechanical properties from ductile (copolymer) to rigid (stereocomplexed copolymer). Furthermore, SC60 exhibited a ∼10 K increase in glass transition temperature (<em>T</em><sub>g</sub>) relative to PLEB60, highlighting the structural reinforcement imparted by stereocomplexation. Our results underscore the importance of copolymerization in modulating stereocomplexation and thus the final material properties of polylactide enantiomeric blends for a wide range of applications, from soft to rigid.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129087"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043505","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

CO2-philic chain extenders: Engineering interfacial activation for optimized cellular morphogenesis in biodegradable polymer foams 亲二氧化碳扩链剂：生物可降解聚合物泡沫中优化细胞形态形成的工程界面激活

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129086

Bo Wen , Gaopeng Wang , Renze Xu , Chenglong Weng , Jintao Yang

{"title":"CO2-philic chain extenders: Engineering interfacial activation for optimized cellular morphogenesis in biodegradable polymer foams","authors":"Bo Wen , Gaopeng Wang , Renze Xu , Chenglong Weng , Jintao Yang","doi":"10.1016/j.polymer.2025.129086","DOIUrl":"10.1016/j.polymer.2025.129086","url":null,"abstract":"<div><div>With the growing global emphasis on environmental protection, supercritical CO<sub>2</sub> foaming technology for biodegradable materials such as polylactic acid (PLA), poly(butylene adipate-co-terephthalate) (PBAT), poly (butylene succinate) (PBS) and their blends has emerged as a research and application hotspot. However, the low melt strength and poor compatibility of these polymers often lead to low nucleation efficiency, cell wall rupture and coalescence, exhibiting inferior foaming performance. In this work, aiming to enhance the foamability of PLA and PLA/PBAT blends, a fluorinated chain extender, F-CE (GMA-co-DFHA-co-MMA), was designed and synthesized. Through the reactive melt blending, F-CE effectively enhanced the melt strength of PLA and interfacial adhesion between PLA and PBAT, leading to a significant improvement in foaming performance. Additionally, the fluorine groups in DFHA demonstrated high affinity for CO<sub>2</sub>, providing additional heterogeneous nucleation sites for bubble formation, thereby increasing both foam expansion ratio and cell density. Notably, the F-CE/PLA foam exhibited a cell diameter of ∼13.8 μm with an exceptionally high expansion ratio of ∼35. As a contrast, pristine PLA foam shows an expansion ratio of ∼30, but with large cell diameter (∼118 μm). Although PLA foam containing CE without fluorine (CE/PLA foam) exhibits small cells with an average cell diameter of ∼13.6 μm, the expansion ratio is low (∼23). In addition, F-CE also exhibits superior performance in improving the foamability of PLA/PBAT blends. This work presents a chain extender specifically engineered for foaming applications, which functions as a highly efficient foaming additive to holistically enhance the foaming performance of polymers.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129086"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043503","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

A novel low shrinkage and improved fracture toughness (LSIT) acrylate-based resin for 3D printing denture base 一种新型低收缩率和提高断裂韧性（LSIT）的丙烯酸酯基树脂用于3D打印义齿基托

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129072

Ludan Qin , Tongtong Ma , Guanqi Liu , Yijiao Zhao , Qiuyi Li , Jiao Wen , Junling Wu , Jianmin Han

{"title":"A novel low shrinkage and improved fracture toughness (LSIT) acrylate-based resin for 3D printing denture base","authors":"Ludan Qin , Tongtong Ma , Guanqi Liu , Yijiao Zhao , Qiuyi Li , Jiao Wen , Junling Wu , Jianmin Han","doi":"10.1016/j.polymer.2025.129072","DOIUrl":"10.1016/j.polymer.2025.129072","url":null,"abstract":"<div><h3>Objective</h3><div>The application of digital light processing (DLP) printing denture base is limited by the photo-curing resin of poor accuracy and fracture. A novel resin with low polymerization shrinkage and improved toughness (named LSIT) was proposed to attack these issues.</div></div><div><h3>Methods</h3><div>The novel LSIT resin and commercial ASIGA Dentbase (AS) resin were prepared by DLP printing, and the conventional heat-polymerized (HP) resin was also fabricated. Physical properties, surface performance, and mechanical properties of the LSIT resin were compared to the AS and HP. Intaglio adaptation of the LSIT and AS denture base was also evaluated, and cell viability was assessed using a CCK-8 kit.</div></div><div><h3>Results</h3><div>The LSIT resin showed a lower polymerization shrinkage (6.70 ± 0.18 %) than the AS (8.23 ± 0.30 %). Compared to the HP and AS resins, it exhibited much more improved fracture toughness with higher maximum stress intensity factor (Kmax = 2.08 ± 0.30 MPa m<sup>1/2</sup>) and total fracture work (Wt = 646.61 ± 129.61 J/m<sup>2</sup>). Its flexural strength and elastic modulus matched the ISO 20795–1:2013 standard, and were closed to the HP. Moreover, the LSIT denture bases at 45°-orientation showed acceptable intaglio adaptation, similar to the AS. No cytotoxicity was detected in any sample.</div></div><div><h3>Conclusion</h3><div>The LSIT resin exhibited lower printing viscosity, higher fracture toughness, and minimal volume shrinkage, offering admirable accuracy, especially at 45°-orientation.</div></div><div><h3>Clinical significance</h3><div>These findings suggested the LSIT resin as a promising solution for addressing polymerization shrinkage and brittleness in 3D printing denture base materials.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129072"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043499","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

Modelling of PEEK crystallisation kinetics using fractional differential equations 用分数阶微分方程模拟PEEK结晶动力学

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129089

Maria Veyrat Cruz-Guzman , Jonathan P.-H. Belnoue , Stephen J. Eichhorn , Adam Chaplin , John Grasmeder , Dmitry S. Ivanov

{"title":"Modelling of PEEK crystallisation kinetics using fractional differential equations","authors":"Maria Veyrat Cruz-Guzman , Jonathan P.-H. Belnoue , Stephen J. Eichhorn , Adam Chaplin , John Grasmeder , Dmitry S. Ivanov","doi":"10.1016/j.polymer.2025.129089","DOIUrl":"10.1016/j.polymer.2025.129089","url":null,"abstract":"<div><div>The crystallisation process of high-performance thermoplastic composites is complex, affecting properties such as strength and toughness. During thermoplastic composite manufacturing, such as over-moulding, the material undergoes a complex thermal history. Process optimisation requires a versatile description of material behaviour. Models to address this must predict crystallinity changes at arbitrary cooling cycles and the process's history dependence, with clear parameter identification. Differential Scanning Calorimetry (DSC) on polyether ether ketone (PEEK) showed discrepancies between dynamic and isothermal data in the crystallinity/crystallisation rate/temperature space, challenging conventional models. A fractional rate model, using the Caputo derivative, was developed to align both datasets. Two fractional kinetics model forms were proposed: one fitted data in the fractional space using Weibull distribution functions of crystallinity and temperature; the other used piecewise surface fit and interpolation. These models were tested against ramp dwell tests and predicted crystallinity with a 5 % error margin. This flexible approach is applicable to thermoplastics and their composites, in a manufacturing context for optimising processes such as over-moulding and additive manufacturing.</div><div>Research data is included in “Veyrat Cruz-Guzman, Maria; Ivanov, Dmitry (2025), “Modelling of PEEK Crystallisation Kinetics Using Fractional Differential Equations”, Mendeley Data, V1, doi: <span><span>10.17632/xxb7rpm8fj.1</span><svg><path></path></svg></span>”</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129089"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043502","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

Self-healable and adhesive polyurethane from soybean oil with reversible disulfide linkages for thermal management 热管理用可逆二硫键大豆油制备可自愈粘接聚氨酯

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129045

Yi Xin Feng , Bili Lin , Yingbing Zou , Lebin Zhan , Changlin Cao , Fubin Luo

{"title":"Self-healable and adhesive polyurethane from soybean oil with reversible disulfide linkages for thermal management","authors":"Yi Xin Feng , Bili Lin , Yingbing Zou , Lebin Zhan , Changlin Cao , Fubin Luo","doi":"10.1016/j.polymer.2025.129045","DOIUrl":"10.1016/j.polymer.2025.129045","url":null,"abstract":"<div><div>Thermally conductive polymers are crucial for high heat flow density devices. Herein, a novel thermally conductive polyurethane elastomer (SHPU) with reversible disulfide linkages was synthesized from soybean oil polyol (SOP). This elastomer exhibits rapid self-repairing capabilities at room temperature. SHPU also demonstrates superior adhesion to various substrates, such as steel, copper, aluminum, epoxy, and polyvinyl chloride, achieving a particularly high adhesion strength of up to 5.51 MPa on steel substrates. Additionally, based on SHPU elastomer, the typical fillers, alumina (Al<sub>2</sub>O<sub>3</sub>) and boron nitride (BN), have been incorporated to prepare highly thermally conductive composites, and achieving a high thermal conductivity of 2.31 W m<sup>−1</sup> K<sup>−1</sup> of SHPU/BN composites. Furthermore, SHPU embedded with fillers still maintain remarkable self-healing capability and adhesion. The unique properties of SHPU demonstrate its great potential as an advanced thermally conductive polymer matrix. This study offers new insights into the development of reliable and sustainable thermally conductive materials.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129045"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043504","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

Synthesis of a biodegradable epoxy-based terpolymer for simultaneously enhancing mechanical and thermal properties of poly(butylene adipate-co-terephthalate)/poly(lactic acid) blends 生物可降解环氧基三元共聚物的合成，可同时提高聚己二酸丁二酯/聚乳酸共混物的机械性能和热性能

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129080

Yang Niu , Xinyi Chen , Yuandong Huang , Shaohua Zeng , Pengpeng Chen , Ying Xu , Wangyan Nie , Hang Liu , Jun Guan , Song Liu , Yifeng Zhou

{"title":"Synthesis of a biodegradable epoxy-based terpolymer for simultaneously enhancing mechanical and thermal properties of poly(butylene adipate-co-terephthalate)/poly(lactic acid) blends","authors":"Yang Niu , Xinyi Chen , Yuandong Huang , Shaohua Zeng , Pengpeng Chen , Ying Xu , Wangyan Nie , Hang Liu , Jun Guan , Song Liu , Yifeng Zhou","doi":"10.1016/j.polymer.2025.129080","DOIUrl":"10.1016/j.polymer.2025.129080","url":null,"abstract":"<div><div>Poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) have complementary physical and chemical properties, but the interface compatibility of PBAT/PLA blends is not ideal, which leads to its poor mechanical properties. To solve the problem of unsatisfactory mechanical properties caused by insufficient compatibility, a biodegradable epoxy-based terpolymer was designed herein and prepared for the interface modification of PBAT/PLA blends. Using styrene (St), 1,6-hexanediol diacrylate (HDDA) and glycidyl methacrylate (GMA) as free radical reaction monomers, the St-HDDA-GMA terpolymer (SHG) with the conversion rate of 70.3 % and epoxide value of 0.351 mol/100g was obtained under optimizable polymerization conditions. SHG-filled PBAT/PLA blend was prepared by a melt blending method using SHG as the reactive compatibilizer. The results showed that SHG could effectively improve the interfacial compatibility of PBAT/PLA blends by in-situ covalent bonding. Compared with neat PBAT/PLA, the tensile strength and elongation at break of 0.7 wt% SHG-filled PBAT/PLA blend were enhanced by about 48.2 % and 215.6 %, respectively. The rheological properties and melt flow index tests showed that the epoxy group participated in the chain expanding reaction of PLA and PBAT, which improved the interface bonding force and interface entangling of the blend. Moreover, the SHG-filled PBAT/PLA blend presents an island-like structure, in which the spherical particles of the PLA phase are of small size and are uniformly distributed within the PBAT phase.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129080"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043506","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

Synthesis and performance study of Polybutene-1 synergistically engineered via H-Shaped long-chain-branching and ethylene co-monomer incorporation h型长链支化与乙烯共聚单体协同工程聚丁烯-1的合成及性能研究

IF 4.5 2区化学

Polymer Pub Date : 2025-09-12 DOI: 10.1016/j.polymer.2025.129088

Huiping Yu , Jin-Yong Dong

{"title":"Synthesis and performance study of Polybutene-1 synergistically engineered via H-Shaped long-chain-branching and ethylene co-monomer incorporation","authors":"Huiping Yu , Jin-Yong Dong","doi":"10.1016/j.polymer.2025.129088","DOIUrl":"10.1016/j.polymer.2025.129088","url":null,"abstract":"<div><div>This paper discusses the synthesis of H-shape long-chain-branched (LCB) 1-butene/ethylene copolymers via ω-alkenylmethyldichlorosilane copolymerization-hydrolysis (ACH) chemistry catalyzed by Ziegler-Natta and metallocene catalysts, where the LCB structures are joined by ethylene co-units to cooperatively modulate the sluggish Form II-I transition kinetics intrinsic to polybutene-1 (PB-1). The results reveal a synergistic effect between the two structural modifications in accelerating the Form II-I transformation. Such an enhancement proves substantially more pronounced with the metallocene catalyst system, where the conventionally 7-day transition period is shortened to within 24 h. Though ethylene incorporation disrupts chain regularity, reducing crystallinity and tensile modulus, it is found that LCB structures effectively counteract such destructive effects by enhancing nucleation and molecular chain entanglement. This research provides a new chemical approach to PB-1 modification that greatly improves its processing properties without significantly affecting mechanical properties.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129088"},"PeriodicalIF":4.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145043501","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