Progress in Rubber, Plastics and Recycling Technology最新文献

The effect of microwave irradiation on the molecular diffusion of the ethyl acetate (EA) into the blend of styrene-butadiene rubber (SBR)/ethylene-propylene-diene monomer rubber (EPDM) 微波辐照对丁苯橡胶（SBR）/三元乙丙橡胶（EPDM）混合物中醋酸乙酯（EA）分子扩散的影响

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-06-15 DOI: 10.1177/14777606241262875

S. Jourabchi, S. Ostad Movahed

{"title":"The effect of microwave irradiation on the molecular diffusion of the ethyl acetate (EA) into the blend of styrene-butadiene rubber (SBR)/ethylene-propylene-diene monomer rubber (EPDM)","authors":"S. Jourabchi, S. Ostad Movahed","doi":"10.1177/14777606241262875","DOIUrl":"https://doi.org/10.1177/14777606241262875","url":null,"abstract":"The rubbers mix to prepare a blend to improve performance and reduce the costs of rubber-made articles. To achieve optimal mechanical and dynamical properties, strong interphases must form between different polymers in a blend. The solvent uptake into the structure of a polymer blend, whether organic or inorganic, is a significant concern in polymer-made articles. In this research, several blends and compounds based on styrene-butadiene rubber (SBR) and ethylene-propylene-diene monomer rubber (EPDM) were prepared. The prepared samples were pre-irradiated by microwaves and immersed in the ethyl acetate (EA) for doing the dynamic swelling experiment. The swelling results were used to determine the molecular diffusion characteristics of the polymer-solvent system. Also, a new method for quantitatively evaluating the interphase between two polymers in a blend was developed using the diffusion characteristics obtained from the swelling experiments. To validate the findings, conventional analytical techniques such as scanning electron microscopy (SEM) and atomic force microscopy (AFM) were employed. The diffusion parameters found in the study were used to determine the degradation mechanism of the immersed SBR/EPDM blend in an organic (EA) solvent and also, to develop a new technique for efficient separation of EA from a solution. In addition, the EPDM/SBR blend with a 20/80 wt ratio at 25°C associated with the lowest interphase showed the highest solvent uptake.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"85 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141337816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of thermo-oxidative ageing on the mechanical properties of unsaturated polyester/wood composites 热氧化老化对不饱和聚酯/木材复合材料机械性能的影响

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-06-06 DOI: 10.1177/14777606241257055

A. Mousa

{"title":"The effect of thermo-oxidative ageing on the mechanical properties of unsaturated polyester/wood composites","authors":"A. Mousa","doi":"10.1177/14777606241257055","DOIUrl":"https://doi.org/10.1177/14777606241257055","url":null,"abstract":"Thermo-oxidative aging (TOA) is a crucial factor that judges the serviceability of a composite material. Therefore, olive husk wastes (OHWs) was subjected to mechanical and chemical treatments in the first and second stages to check its potential as a reinforcement for unsaturated polyester (UPE) to produce PWC. The mechanical treatment involved milling using a ball mill, followed by mechanical sifting to obtain the smallest particle size. Raw OHW (R-OHW) was progressively increased from 0 to 50 phr and incorporated into the UPE resin. The prepared composites were subjected to TOA process using an air-circulating furnace. The unaged and aged samples were characterized with respect to mechanical properties. The highest retention% was displayed by the sample with 30 phr OHW. The sample with 10 and 30 phr content was subjected to hydrogen peroxide (P-OHW) and di-octylphalate (DOP) treatments (D-OHW) under ambient conditions for 24 h, followed by incorporation into the UPE resin. The prepared composites were undergone TOA process, as before. It has been found that the composition with 10 phr OHW displayed the highest retention% in terms of mechanical performance. Thus, the chemical treatment decreased the OHW amount to be incorporated into the UPE.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"66 s260","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141376341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the performance of waste-paper particleboard using silica and aluminum hydroxide fillers 使用二氧化硅和氢氧化铝填料提高废纸刨花板的性能

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-03-29 DOI: 10.1177/14777606241243114

Suradet Matchawet, Abedeen Dasaesamoh, N. Hayeemasae, A. Worlee, U. Sookyung

引用次数: 0

Preliminary evaluation of properties and performance of natural rubber (NR) latex band for microplastic capturing in seawater 用于捕捉海水中微塑料的天然橡胶（NR）乳胶带的特性和性能初步评估

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-02-11 DOI: 10.1177/14777606241231886

Nur Ayunni Ahmad Shahrul Amin, Nur Shauqina Mohd Sabri, Neettha Nai Sem, Muaz Mohd Zaini Makhtar, M. Shafiq

{"title":"Preliminary evaluation of properties and performance of natural rubber (NR) latex band for microplastic capturing in seawater","authors":"Nur Ayunni Ahmad Shahrul Amin, Nur Shauqina Mohd Sabri, Neettha Nai Sem, Muaz Mohd Zaini Makhtar, M. Shafiq","doi":"10.1177/14777606241231886","DOIUrl":"https://doi.org/10.1177/14777606241231886","url":null,"abstract":"Microplastic particles are emerging water-laden waste that cause a worrying concern towards the environment and humans health. Due to its small size and geometry, and uncertain surface properties, the microplastic waste capturing method in water is still evolving. To date, a number of findings report on the emergence of microplastic surface charging, especially when exposed to water environment. In this study, the natural rubber (NR) latex band was utilized to capture the microplastic waste via a surface capturing mechanism. The NR band was produced using a film casting and curing methods. The surface charging mechanism on the NR band was introduced via the usage of high amount of ZDEC accelerator and, periodic stretching and relaxation procedures. In this work, ZDEC was used as an accelerator for the rubber formulation, and surface charge booster for the NR band. The surface charge of the NR band generates electrostatic interaction with the microplastic waste in water. The polypropylene (PP) microplastic was captured via the surface attraction mechanism using the manufactured NR band. Based on FTIR analysis, the presence of PP microplastic can be quantified on the contaminated NR band surface. The NR band shows the improvement in tensile and tear properties and crosslink density, mainly due to high amount of ZDEC used. At ZDEC loading of 20 phr, the NR band recorded the highest surface potential value, and this is owing to the formation of Zn2+ complex ions on its surface. XRF analysis indicates that the increment of Zn content in the NR band with increasing ZDEC content, that suggests the formation of Zn2+ complex ions.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"109 50","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139785450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary evaluation of properties and performance of natural rubber (NR) latex band for microplastic capturing in seawater 用于捕捉海水中微塑料的天然橡胶（NR）乳胶带的特性和性能初步评估

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-02-11 DOI: 10.1177/14777606241231886

Nur Ayunni Ahmad Shahrul Amin, Nur Shauqina Mohd Sabri, Neettha Nai Sem, Muaz Mohd Zaini Makhtar, M. Shafiq

{"title":"Preliminary evaluation of properties and performance of natural rubber (NR) latex band for microplastic capturing in seawater","authors":"Nur Ayunni Ahmad Shahrul Amin, Nur Shauqina Mohd Sabri, Neettha Nai Sem, Muaz Mohd Zaini Makhtar, M. Shafiq","doi":"10.1177/14777606241231886","DOIUrl":"https://doi.org/10.1177/14777606241231886","url":null,"abstract":"Microplastic particles are emerging water-laden waste that cause a worrying concern towards the environment and humans health. Due to its small size and geometry, and uncertain surface properties, the microplastic waste capturing method in water is still evolving. To date, a number of findings report on the emergence of microplastic surface charging, especially when exposed to water environment. In this study, the natural rubber (NR) latex band was utilized to capture the microplastic waste via a surface capturing mechanism. The NR band was produced using a film casting and curing methods. The surface charging mechanism on the NR band was introduced via the usage of high amount of ZDEC accelerator and, periodic stretching and relaxation procedures. In this work, ZDEC was used as an accelerator for the rubber formulation, and surface charge booster for the NR band. The surface charge of the NR band generates electrostatic interaction with the microplastic waste in water. The polypropylene (PP) microplastic was captured via the surface attraction mechanism using the manufactured NR band. Based on FTIR analysis, the presence of PP microplastic can be quantified on the contaminated NR band surface. The NR band shows the improvement in tensile and tear properties and crosslink density, mainly due to high amount of ZDEC used. At ZDEC loading of 20 phr, the NR band recorded the highest surface potential value, and this is owing to the formation of Zn2+ complex ions on its surface. XRF analysis indicates that the increment of Zn content in the NR band with increasing ZDEC content, that suggests the formation of Zn2+ complex ions.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"118 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139845329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance assessment of aluminum chips in reduced-scale friction for developing copper-free elastomer-modified friction composites 铝屑在缩小尺度摩擦中的性能评估，用于开发无铜弹性体改性摩擦复合材料

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-02-05 DOI: 10.1177/14777606241231887

P. Ghosh

{"title":"Performance assessment of aluminum chips in reduced-scale friction for developing copper-free elastomer-modified friction composites","authors":"P. Ghosh","doi":"10.1177/14777606241231887","DOIUrl":"https://doi.org/10.1177/14777606241231887","url":null,"abstract":"This research paper investigates the frictional and thermomechanical properties of a copper (Cu) free non-asbestos organic (NAO) composite for developing brake friction material for automotive/railway applications. Reduced-scale brake composites were manufactured and tested in a pin on disc tribometer. The effect of aluminum (Al) chips on the dry sliding wear behavior of acrylonitrile-butadiene rubber (NBR) modified phenolic resin-based reduced-scale friction composites was investigated. Other common ingredients of friction materials like fiber, filler, and friction modifiers were not included to get the specific effect of Al on the various properties of the composites. Four composites were prepared with varying Al content, for example, 25, 50, 75, and 100 phr (parts per hundred resins). The average COF increases by ∼70% for 75 phr Al loaded composite (optimum composition) compared to the base composite (devoid of Al). However, mechanical properties, such as hardness and flexure strength, decrease with increasing phr of Al, although compressive strength does not change significantly. The optimum composite exhibits the lowest specific wear rate among Al chips loaded composites. The optimum composite also shows nearly three times improvement in thermal conductivity compared to the base composite. The wear behavior of the composites has been analyzed from the scanning electron microscopy (SEM) images.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"105 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139865417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance assessment of aluminum chips in reduced-scale friction for developing copper-free elastomer-modified friction composites 铝屑在缩小尺度摩擦中的性能评估，用于开发无铜弹性体改性摩擦复合材料

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-02-05 DOI: 10.1177/14777606241231887

P. Ghosh

{"title":"Performance assessment of aluminum chips in reduced-scale friction for developing copper-free elastomer-modified friction composites","authors":"P. Ghosh","doi":"10.1177/14777606241231887","DOIUrl":"https://doi.org/10.1177/14777606241231887","url":null,"abstract":"This research paper investigates the frictional and thermomechanical properties of a copper (Cu) free non-asbestos organic (NAO) composite for developing brake friction material for automotive/railway applications. Reduced-scale brake composites were manufactured and tested in a pin on disc tribometer. The effect of aluminum (Al) chips on the dry sliding wear behavior of acrylonitrile-butadiene rubber (NBR) modified phenolic resin-based reduced-scale friction composites was investigated. Other common ingredients of friction materials like fiber, filler, and friction modifiers were not included to get the specific effect of Al on the various properties of the composites. Four composites were prepared with varying Al content, for example, 25, 50, 75, and 100 phr (parts per hundred resins). The average COF increases by ∼70% for 75 phr Al loaded composite (optimum composition) compared to the base composite (devoid of Al). However, mechanical properties, such as hardness and flexure strength, decrease with increasing phr of Al, although compressive strength does not change significantly. The optimum composite exhibits the lowest specific wear rate among Al chips loaded composites. The optimum composite also shows nearly three times improvement in thermal conductivity compared to the base composite. The wear behavior of the composites has been analyzed from the scanning electron microscopy (SEM) images.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"50 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139805785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of intercalated hydrotalcite materials and its effect on thermal stability properties of polyvinyl chloride 插层氢铝酸盐材料的制备及其对聚氯乙烯热稳定性能的影响

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2024-01-23 DOI: 10.1177/14777606241229205

Guifang Du, Jinsheng Duan, Peijie Jia, Zhaogang Liu, Fushan Feng, Yanhong Hu, Jinxiu Wu, Xiaowei Zhang, Jianfei Li

{"title":"Preparation of intercalated hydrotalcite materials and its effect on thermal stability properties of polyvinyl chloride","authors":"Guifang Du, Jinsheng Duan, Peijie Jia, Zhaogang Liu, Fushan Feng, Yanhong Hu, Jinxiu Wu, Xiaowei Zhang, Jianfei Li","doi":"10.1177/14777606241229205","DOIUrl":"https://doi.org/10.1177/14777606241229205","url":null,"abstract":"In this study, ZnAlLa-maleate-LDHs was synthesized using the co-precipitation-hydrothermal method. The effects of aluminum-lanthanum ratio, co-precipitation time, hydrothermal time, and hydrothermal temperature on the crystal structure were investigated. As indicated by the result, the optimal condition was n (Al3+): n (La3+) = 10:1, the co-precipitation time reached 24 h, the hydrothermal time was 8 h, and the hydrothermal temperature reached 180°C. The effect of hydrotalcite on the thermal stability properties and plasticizing properties of PVC was analyzed. The result suggested that ZnAlLa-maleate-LDHs enhanced the thermal stability, plasticizing properties, and mechanical properties of PVC compared with ZnAlLa-CO3-LDHs. The layer spacing of hydrotalcite was increased with the introduction of maleic acid, such that the entry of Cl− into the interlayer guest was facilitated, and the decomposition of PVC was inhibited. Moreover, the long-term thermal stability mechanism was analyzed using FTIR before and after hydrochloric acid treatment. As revealed by the above result, the thermal stabilizer ZnAlLa-maleate-LDHs are capable of hindering the breakage of C-Cl bonds in PVC, inhibiting the formation of HCl, and playing a certain role in thermal stabilization.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"80 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139603995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Examination of the permeability of rubberized concrete with different water/cement ratios and their resistance against acid and sulfate attack 研究不同水灰比橡胶混凝土的渗透性及其抗酸碱和硫酸盐侵蚀的能力

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2023-12-22 DOI: 10.1177/14777606231224132

U. Kandil, H. A. Bulut

{"title":"Examination of the permeability of rubberized concrete with different water/cement ratios and their resistance against acid and sulfate attack","authors":"U. Kandil, H. A. Bulut","doi":"10.1177/14777606231224132","DOIUrl":"https://doi.org/10.1177/14777606231224132","url":null,"abstract":"This study aims to examine the permeability and acid and sulfate attack of waste rubber-substituted concrete containing recycled rubber in three different grain size classes (chips, crumb and powder) with two different water/cement (w/c) ratios (0.4 and 0.5). Waste rubber at different ratios (0%, 4%, 8%, 12%, 16%, 20%, and 24%) was used in concrete by replacing fine and coarse aggregates. Sorptivity, electrical resistivity, and acid and sulfate attack tests were conducted on concrete cured for 90 days. Although the capillarity coefficient values increased with the waste rubber replacement ratio increase, a decrease occurred after the 20% waste rubber replacement ratio. In 12% waste rubber-substituted concrete (0.4WR12) with a water/cement ratio of 0.4, the electrical resistivity value (8.3 kΩ.cm) was the highest, and concretes with low permeability could be produced. As a result of the use of 16% waste rubber in the concrete, 75% less compressive strength loss was observed after the acid attack compared to the control concrete. In concrete with a water/cement ratio of 0.5, when the waste rubber ratio increased by up to 16%, the compressive strength losses caused by the sulfate attack decreased dramatically (95.76% less) compared to the control concrete. The rubberized concrete with a water/cement ratio of 0.5 showed high resistance to acid and sulfate attacks. The experiment results showed that 12% to 16% waste rubbers are ideal ratios. In this study, the water/cement ratio was a valuable parameter for the waste rubber ratio in rubberized concrete.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"67 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139163755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of hydrophobicity in natural rubber vulcanizates using diatomaceous earth 使用硅藻土增强天然橡胶硫化胶的疏水性

Progress in Rubber, Plastics and Recycling Technology Pub Date : 2023-12-21 DOI: 10.1177/14777606231224129

Sachini Narmada Dissanayake, Kanishka De Silva, S. Egodage, Frank Dennis Blum, Madhubhashini Maddumaarachchi

{"title":"Enhancement of hydrophobicity in natural rubber vulcanizates using diatomaceous earth","authors":"Sachini Narmada Dissanayake, Kanishka De Silva, S. Egodage, Frank Dennis Blum, Madhubhashini Maddumaarachchi","doi":"10.1177/14777606231224129","DOIUrl":"https://doi.org/10.1177/14777606231224129","url":null,"abstract":"This study discusses an approach that gives the Natural Rubber (NR) vulcanizates an elevated hydrophobic character. The method used a chemically treated filler called diatomaceous earth (DE) to deliver the hydrophobic characteristics to NR. DE has a nanoscale roughness. It was chemically treated with hexadecyltrimethoxy silane to obtain low surface energy. The combination of nanoscale roughness and low surface energy gave superhydrophobic properties to DE. A series of treated-DE was made with varying silane percentages to find an optimum silane to DE ratio to get the maximum possible hydrophobicity. The optimum ratio was recorded as 38% w/w, and the treated DE displayed a superhydrophobic water contact angle (WCA) of 152°. The treated-DE was added to the rubber as a filler during the compounding process. The filler was added in varying amounts of 5 phr, 10 phr, 15 phr, and 20 phr to observe the changes in the hydrophobic property. The wettability and morphology of developed vulcanizates were measured using WCA measurements and scanning electron microscope (SEM) analysis, respectively. NR compounded with 20 phr filler exhibited an enhanced WCA of 136°, compared to the WCA of 92° of the NR vulcanizate with no treated-DE, and displayed improved tensile, and tear properties.","PeriodicalId":508656,"journal":{"name":"Progress in Rubber, Plastics and Recycling Technology","volume":"6 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139166756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0