Polymers最新文献_第6页

Computational and Experimental Optimization of Injection-Molded Compliant Constant-Torque Mechanisms in Polymeric Materials. 聚合物材料注射成型柔顺恒力矩机构的计算与实验优化。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182505

Tran Minh The Uyen, Hai Nguyen Le Dang, Van-Thuc Nguyen, Minh-Tai Le, Nguyen Van Son, Thanh Trung Do, Le Quang Linh, Vu Manh Hoang, Phi Hoang Minh, Pham Son Minh

{"title":"Computational and Experimental Optimization of Injection-Molded Compliant Constant-Torque Mechanisms in Polymeric Materials.","authors":"Tran Minh The Uyen, Hai Nguyen Le Dang, Van-Thuc Nguyen, Minh-Tai Le, Nguyen Van Son, Thanh Trung Do, Le Quang Linh, Vu Manh Hoang, Phi Hoang Minh, Pham Son Minh","doi":"10.3390/polym17182505","DOIUrl":"10.3390/polym17182505","url":null,"abstract":"In this research, we explore the computational and experimental optimization of compliant constant-torque mechanisms (CTMs) fabricated via injection molding using polymeric materials. We investigate how geometric variations influence the torsional strength of CTMs through numerical simulation, experimental validation, and artificial neural network (ANN) modeling. Four different geometries with the same overall dimensions were designed and analyzed to quantify their mechanical performance. The results reveal that the geometric configuration significantly affected the torsional behavior of the CTMs, with circular cross-sections demonstrating superior strength. Moreover, the ANN model exhibited a high prediction accuracy and minimal relative errors, closely aligning with the experimental outcomes. Despite this, discrepancies between our numerical and experimental results suggest that further refinements in material modeling and manufacturing processes are warranted. In this paper, we emphasize the importance of integrating computational (CAE), artificial neural networks (ANNs) and experimental techniques for optimizing polymer-based CTMs. CAE simulations for Model 4 showed a constant-torque section from 23-44 degrees with 0.142 N·m torque, while experimental and ANN results indicated a longer range (20-45/46 degrees) with higher torque values (0.164 N·m). Experimental and ANN predictions for Model 4 showed an approximate 97% similarity. While these findings represent a foundational step, the characteristics of polymer CTMs suggest potential relevance for advancing applications in precision engineering, biomedical devices, and soft robotics, pending further application-specific validation.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473815/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolution of Microstructure and Performance in Polyacrylonitrile Precursor Fibers: A Comparison of Spinning Processes. 聚丙烯腈前驱纤维的微观结构和性能演变：纺丝工艺的比较。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182504

Liang Cao, Lili Zhang, Zhenbo Zhao, Shaowei Wang, Zhaowei Li, Deqi Jing, Shouchun Zhang

{"title":"Evolution of Microstructure and Performance in Polyacrylonitrile Precursor Fibers: A Comparison of Spinning Processes.","authors":"Liang Cao, Lili Zhang, Zhenbo Zhao, Shaowei Wang, Zhaowei Li, Deqi Jing, Shouchun Zhang","doi":"10.3390/polym17182504","DOIUrl":"10.3390/polym17182504","url":null,"abstract":"The microstructure of polyacrylonitrile (PAN) precursor fibers has a profound influence on the performance of carbon fibers and depends on the spinning processes and processing conditions. This study compared the evolution of the microstructures and performance of PAN fibers between the wet-spinning and dry-jet wet-spinning processes, utilizing scanning electron microscopy, small/wide-angle X-ray scattering, dynamic mechanical analysis, and single-fiber tensile testing. Both spinning processes promoted the oriented alignment of microfibrils and fibrils, improved the crystal arrangement and molecular regularity, and facilitated the transition from a two-phase (crystalline/amorphous) structure to a single-phase structure, thereby gradually improving the fibers' elastic character and mechanical properties. However, wet-spun fibers exhibited inherent defects (skin-core structure and large voids), which caused surface grooves, radial mechanical heterogeneity, and low breaking elongation during post-spinning. In contrast, dry-jet wet-spun fibers initially had a smooth surface and a homogeneous radial structure, which evolved into well-oriented, radially homogeneous structures during post-spinning. Furthermore, the dry-jet wet-spinning process produced greater increases in crystallinity (46%), crystal size (258%), and orientation index (146%) than the wet-spinning process did. The dry-jet wet-spinning process's superiority in forming and optimizing the fiber microstructure gives it greater potential for producing high-quality PAN precursor fibers.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473616/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Considering a Non-Constant Anisotropicity Parameter in the Giesekus Model. 考虑Giesekus模型中非恒定各向异性参数。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182510

Fatemeh Karami, Pavlos S Stephanou

引用次数: 0

3D-Printed Continuous Flax Fiber-Reinforced Composites Based on a Dual-Resin System. 基于双树脂体系的3d打印连续亚麻纤维增强复合材料。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182515

Yu Long, Zhongsen Zhang, Zhixiong Bi, Kunkun Fu, Yan Li

{"title":"3D-Printed Continuous Flax Fiber-Reinforced Composites Based on a Dual-Resin System.","authors":"Yu Long, Zhongsen Zhang, Zhixiong Bi, Kunkun Fu, Yan Li","doi":"10.3390/polym17182515","DOIUrl":"10.3390/polym17182515","url":null,"abstract":"Compared with traditional continuous plant fiber-reinforced thermoplastic composites, their 3D-printed counterparts offer distinct advantages in the rapid fabrication of complex geometries with integrated forming capabilities. However, the impregnation process of continuous plant fiber yarn with thermoplastic resin presents greater technical challenges compared to conventional synthetic fibers (e.g., carbon or glass fibers) typically employed in continuous fiber composites, owing to the yarn's unique twisted structure. In addition, low molding pressure during 3D printing makes resin impregnation more difficult. To address the impregnation difficulty within plant fiber yarn during 3D printing, we employed two low-viscosity resins, liquid thermoplastic resin (specifically, reactive methyl methacrylate) and thermosetting epoxy resin, to pre-impregnate flax yarns, respectively. A dual-resin prepreg filament is developed for 3D printing of flax fiber-reinforced composites, involving re-coating pre-impregnated flax yarns with polylactic acid. The experimental results indicate that liquid thermoplastic resin-impregnated composites exhibit enhanced mechanical properties, surpassing the epoxy system by 39% in tensile strength and 29% in modulus, attributed to improved impregnation and better interfacial compatibility. This preparation method demonstrates the feasibility of utilizing liquid thermoplastic resin in 3D-printed continuous plant fiber composites, offering a novel approach for producing highly impregnated continuous fiber filaments.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473954/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the Foaming Characteristics and Rheological Properties of Warm-Mix Foamed Polymer-Modified Bitumen Based on Waste Molecular Sieves. 废分子筛热混泡沫聚合物改性沥青的发泡特性及流变性能研究

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182516

Qiang Ye, Gongying Ding, Meng Yuan, Bei Chen

{"title":"Research on the Foaming Characteristics and Rheological Properties of Warm-Mix Foamed Polymer-Modified Bitumen Based on Waste Molecular Sieves.","authors":"Qiang Ye, Gongying Ding, Meng Yuan, Bei Chen","doi":"10.3390/polym17182516","DOIUrl":"10.3390/polym17182516","url":null,"abstract":"Warm-mix foamed polyurethane modified bitumen (WPB) has been widely promoted due to its significant warm-mix effect and high viscosity. However, it still has problems such as too fast foam dissipation and unstable performance. Waste molecular sieves have an extremely fine pore structure that can absorb moisture. The porous characteristics of waste molecular sieves are used to adsorb water and let it slowly release water in bitumen. If the foam dissipation time can be prolonged and the bitumen expansion speed can be reduced, it will help to stabilize the performance of foamed bitumen. This paper conducts a study on the foaming characteristics and rheological properties of WPB based on waste molecular sieves. First, the bitumen foaming test is used to analyze the foaming characteristics of WPB with waste molecular sieves. Second, the basic properties of warm-mix foamed polymer-modified bitumen, including penetration, softening point, ductility, and viscosity, are investigated. Finally, a dynamic shear rheometer (DSR) is employed to study the high-temperature rutting resistance and high-temperature permanent deformation resistance of warm-mix foamed polymer-modified bitumen. The research results show that the amount of foaming water is the primary factor influencing bitumen foaming. The addition of waste molecular sieves has a significant impact on the intensity and duration of the bitumen foaming reaction. WPB with waste molecular sieves has a greater consistency and better high-temperature performance, but its low-temperature performance is somewhat weakened. The high-temperature deformation resistance of WPB with waste molecular sieves is superior to that of ordinary WPB and is affected by the amount of foaming water. An appropriate amount of foaming water can enable WPB with waste molecular sieves to exhibit excellent high-temperature deformation resistance.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473413/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Thickness on the Uniaxial Compression Failure Behavior of CFRP Laminates. 厚度对CFRP复合材料单轴压缩破坏行为的影响。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182518

Zixing Qin, Huiming Ding, Shiyang Zhu, Can Jin, Jian Wang, Jiaxin Li, Han Wang

{"title":"Effect of Thickness on the Uniaxial Compression Failure Behavior of CFRP Laminates.","authors":"Zixing Qin, Huiming Ding, Shiyang Zhu, Can Jin, Jian Wang, Jiaxin Li, Han Wang","doi":"10.3390/polym17182518","DOIUrl":"10.3390/polym17182518","url":null,"abstract":"Carbon Fiber Reinforced Composite (CFRP) is widely used in deep-sea pressure-resistant structures. With the increase in submergence depth demand leading to the increase in the thickness of the CFRP shell plate, there is a significant thickness effect on its compression performance. In order to study the mechanism of the decrease in compression performance of the laminate, uniaxial compression tests, interlaminar shear tests, out-of-plane tensile tests, damage characterization, and FEM analysis were carried out on three thicknesses of laminates. The results showed that the compressive strength, interlaminar shear strength, out-of-plane tensile strength of laminates and FEM compression model decreased by 10.3%, 12.7%, 23.6%, and 13.6% when the thickness of the laminate was increased from 2 mm to 12 mm. Concurrently, the compression failure mechanism is transformed from the overall strength failure to the instability-crush failure mode caused by the initial delamination. The effects of out-of-plane tensile strength and interlaminar shear strength on compressive properties were also considered. It provides support for the regulation of compression performance of large-thickness laminates and the safety of deep-sea pressure-resistant structures in service.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473190/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on the Elastic-Plastic Behaviors of Bicontinuous Polymer Matrix and Carbon Fiber-Reinforced Composites Based on Micromechanical Modelling. 基于细观力学建模的双连续聚合物基-碳纤维增强复合材料弹塑性行为研究。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182517

Bin Yao, Liang Ren, Guocheng Qi, Yukun Zhao, Zhen Xu, Long Chen, Dongmei Wang, Rui Zhang

{"title":"Research on the Elastic-Plastic Behaviors of Bicontinuous Polymer Matrix and Carbon Fiber-Reinforced Composites Based on Micromechanical Modelling.","authors":"Bin Yao, Liang Ren, Guocheng Qi, Yukun Zhao, Zhen Xu, Long Chen, Dongmei Wang, Rui Zhang","doi":"10.3390/polym17182517","DOIUrl":"10.3390/polym17182517","url":null,"abstract":"Due to the potential to integrate structural load bearing and energy storage within one single composite structural component, the development of carbon fiber (CF)-based structural power composites (SPCs) has garnered significant attention in electric aircraft, electric vehicles, etc. Building upon our previous investigation of the electrochemical performance of SPCs, this work focuses on elastic-plastic behaviors of the bicontinuous structural electrolyte matrices (BSEMs) and carbon fiber composite electrodes (CFCEs) in SPCs. Representative volume element (RVE) models of the BSEMs were numerically generated based on the Cahn-Hilliard equation. Furthermore, RVE models of the CFCEs were established, consisting of the BSEM and randomly distributed CFs. The moduli of BSEMs and the transverse moduli of CFCEs with different functional pore phase volume fractions were predicted and validated against experimental results. Additionally, the local plasticity of BSEMs and CFCEs in the tensile process was analyzed. The work indicates that the presence of the bicontinuous structure prolongs the plasticity evolution process, compared with the traditional polymer matrix, which could be used to explain the brittle-ductile transition observed in the matrix-dominated load-bearing process of CFCEs in the previous literature. This work is a step forward in the comprehensive interpretation of the elastic-plastic behaviors of bicontinuous matrices and multifunctional SPCs for realistic engineering applications.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473804/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Properties of Organometallic Lactone-Containing Poly(benzofuran-co-arylacetic Acid): Traditional Synthesis Versus Mechanosynthesis. 含有机金属内酯聚苯并呋喃共芳基乙酸的性质探讨：传统合成与机械合成。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182511

Teodora Radu, Alexandrina Nan, Monica Dan, Maria Miclǎuş, Natalia Terenti

{"title":"Exploring the Properties of Organometallic Lactone-Containing Poly(benzofuran-co-arylacetic Acid): Traditional Synthesis Versus Mechanosynthesis.","authors":"Teodora Radu, Alexandrina Nan, Monica Dan, Maria Miclǎuş, Natalia Terenti","doi":"10.3390/polym17182511","DOIUrl":"10.3390/polym17182511","url":null,"abstract":"This work describes the synthesis and characterization of novel organometallic polymeric frameworks derived from lactone-based poly(benzofuran-co-arylacetic acid) (PBAAA) ligands complexed with 3d transition metal salts (Co2+, Cu2+, Zn2+). Two distinct synthetic approaches were investigated: conventional solution-based methods and mechanochemical ball milling. A comprehensive spectroscopic evaluation was performed utilizing FTIR, XRD, UV-Vis, and XPS techniques to detail the structural characteristics of the synthesized materials. The thermal assessments were conducted using TGA and thermal conductivity, demonstrating that the chosen synthesis method has a significant impact on the crystallinity, coordination environment, and thermal transport characteristics of the resultant complexes. Remarkably, using the mechanosynthesis, the resulting organometallic polymer materials exhibited enhanced chain ordering and improved thermal conductivity, with a value of 0.32 W/mK, almost double that of the starting polymer. A correlation was identified among thermal conductivity, metal ionic radius, coordination number, and the synthesis method utilized. XPS analysis revealed the presence of multiple oxidation states and varied electronic environments, particularly in copper complexes. These had a direct effect on how they behaved when heated. These results show that mechanochemical synthesis is a useful and long-lasting method to make complex organometallic polymers with thermal properties that can be changed.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473338/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antimicrobial Evaluation of Chlorophyll-Containing Nettle Extract Both in Free Form and Incorporated into Poly-3-Hydroxybutyrate. 含叶绿素荨麻提取物（游离形式和加入聚3-羟基丁酸酯）的抗菌评价。

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182507

Polina M Tyubaeva, Ivetta A Varyan, Sergei I Obydennyi, Vasily A Merzlikin, Svetlana G Karpova, Olga A Gruznova, Dmitry V Gruznov, Ekaterina N Shuteeva, Nikolay N Kuvshinchikov, Nikolay I Popov, Anton V Lobanov, Ivan A Abramov, Andrey P Sergeev, Anzhelika V Zagaynova, Anatoly A Olkhov

引用次数: 0

Tribological Response of Glass Fiber/Polyester Composites After Pressurized Water-Immersion Aging Assessed by Reciprocating and Ball-on-Disc Wear Testing. 玻璃纤维/聚酯复合材料加压水浸老化后的摩擦学响应

IF 4.9 3区工程技术

Polymers Pub Date : 2025-09-17 DOI: 10.3390/polym17182503

Sinan Fidan, Satılmış Ürgün, Mehmet İskender Özsoy, Mustafa Özgür Bora, Erman Güleç

{"title":"Tribological Response of Glass Fiber/Polyester Composites After Pressurized Water-Immersion Aging Assessed by Reciprocating and Ball-on-Disc Wear Testing.","authors":"Sinan Fidan, Satılmış Ürgün, Mehmet İskender Özsoy, Mustafa Özgür Bora, Erman Güleç","doi":"10.3390/polym17182503","DOIUrl":"10.3390/polym17182503","url":null,"abstract":"This study quantifies how pressurized water-immersion aging degrades the tribological response of cross-ply E-glass/polyester laminates by coupling dual-mode testing with surface metrology and factorial ANOVA. Eleven-ply [0/90]s plates were aged at 10 bar for 0, 7, 14, and 21 days, gaining 10% mass (72.2 to 79.4 g), then tested under 20 N in ball-on-disc (50-100 mm s-1; 100-200 m) and reciprocating modes (1-2 Hz; 10-20 m). In ball-on-disc tests, steady-state COF rose from 0.40 to 0.47 (unaged) to 0.49 to 0.52 (14-21 days), and the low-friction run-in largely vanished with aging. Wear scar width and depth increased from 1.38 to 1.90 mm and 75 to 117 µm, respectively. Reciprocating tests showed a non-monotonic trend: moderate aging lowered COF to 0.50, whereas 21 days produced the harshest response (up to 0.78) and the widest/deepest scars (1.15 to 1.95 mm; 40 to 110 µm). ANOVA revealed that, in ball-on-disc tests, the COF was governed by sliding distance (28.70%) and speed (24.64%), with a strong Days × Speed interaction (31.66%); track-depth variance was dominated by distance (42.16%) and aging (32.16%). For the COF under reciprocating tests, aging was the leading main effect (21.21%), with large Days × Frequency (20.36%) and Days × Track (20.03%) interactions. Uniquely, this study isolates the effect of controlled hydrostatic aging (10 bar) and compares two sliding kinematics under identical loads, establishing quantitative thresholds (14 and 21 days) where interfacial debonding and third-body abrasion accelerate.","PeriodicalId":20416,"journal":{"name":"Polymers","volume":"17 18","pages":""},"PeriodicalIF":4.9,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12473698/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145177883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0