发布求助
文献互助 智能选刊 最新文献

Polimeros-ciencia E Tecnologia最新文献

筛选
英文 中文
Recent advances in the use of Polyamide-based materials for the automotive industry 聚酰胺基材料用于汽车工业的最新进展
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2022-01-01 DOI: 10.1590/0104-1428.20220042
M. Kondo, L. Montagna, G. F. Morgado, André Luiz Guimarães de Castilho, Larissa Anne Pereira dos Santos Batista, E. C. Botelho, M. L. Costa, F. R. Passador, M. C. Rezende, Marcos Valério Ribeiro
{"title":"Recent advances in the use of Polyamide-based materials for the automotive industry","authors":"M. Kondo, L. Montagna, G. F. Morgado, André Luiz Guimarães de Castilho, Larissa Anne Pereira dos Santos Batista, E. C. Botelho, M. L. Costa, F. R. Passador, M. C. Rezende, Marcos Valério Ribeiro","doi":"10.1590/0104-1428.20220042","DOIUrl":"https://doi.org/10.1590/0104-1428.20220042","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67122094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Evaluation of lignin as stabilizer in vulcanized natural rubber formulations 木质素在硫化天然橡胶配方中作为稳定剂的评价
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2022-01-01 DOI: 10.1590/0104-1428.20220077
G. A. Carpenedo, N. B. Guerra, M. Giovanela, M. Paoli, J. S. Crespo
{"title":"Evaluation of lignin as stabilizer in vulcanized natural rubber formulations","authors":"G. A. Carpenedo, N. B. Guerra, M. Giovanela, M. Paoli, J. S. Crespo","doi":"10.1590/0104-1428.20220077","DOIUrl":"https://doi.org/10.1590/0104-1428.20220077","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67122141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scaffold based on castor oil as an osteoconductive matrix in bone repair: biocompatibility analysis 以蓖麻油为骨传导基质的骨修复支架:生物相容性分析
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2022-01-01 DOI: 10.1590/0104-1428.210018
F. Lima, Luis Felipe Matos, Isnayra Kerolaynne Carneiro Pacheco, F. Reis, J. Câmara, J. Pierote, José Milton Matos, Alessandra A. Ribeiro, W. Moura, Ana Cristina Fialho
{"title":"Scaffold based on castor oil as an osteoconductive matrix in bone repair: biocompatibility analysis","authors":"F. Lima, Luis Felipe Matos, Isnayra Kerolaynne Carneiro Pacheco, F. Reis, J. Câmara, J. Pierote, José Milton Matos, Alessandra A. Ribeiro, W. Moura, Ana Cristina Fialho","doi":"10.1590/0104-1428.210018","DOIUrl":"https://doi.org/10.1590/0104-1428.210018","url":null,"abstract":"e Química Fina, Universidade Católica Portuguesa, Porto, Portugal *jvfrazao92@hotmail.com Obstract To analyze the biocompatibility of the scaffold produced from a natural polymer derived from castor oil through hemolytic activity and antimicrobial activity, to enable the clinical application. Three in vitro tests were performed: Hemolytic activity test - Polymer partially dissolved in contact with blood agar; Hemolytic activity test in sheep’s blood - Polymer extract with red blood cells solution; Antimicrobial activity test - Solid polymer in direct contact with E. Coli and S. Aureus. For hemolytic tests, none of the samples showed hemolysis. Negative hemolytic activity is a good indicator, as the maintenance of the blood clot in the area of the lesion is essential for the formation of new tissue. For the antimicrobial activity test, no significant activity was observed against the bacteria used. The polymer is not toxic to red blood cells, being","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"79 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67124663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Evaluation of magnetic poly(methyl methacrylate) microspheres as catalysts in heterogeneous Fenton processes 磁性聚甲基丙烯酸甲酯微球作为非均相Fenton工艺催化剂的评价
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2022-01-01 DOI: 10.1590/0104-1428.20220029
Alan Kardec da Silva, E. C. C. Torquato, Jacira Aparecida Castanharo, M. A. S. Costa, M. Marques, L. C. Costa
{"title":"Evaluation of magnetic poly(methyl methacrylate) microspheres as catalysts in heterogeneous Fenton processes","authors":"Alan Kardec da Silva, E. C. C. Torquato, Jacira Aparecida Castanharo, M. A. S. Costa, M. Marques, L. C. Costa","doi":"10.1590/0104-1428.20220029","DOIUrl":"https://doi.org/10.1590/0104-1428.20220029","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cross-link density measurement of nitrile rubber vulcanizates using dynamic shear test 动态剪切试验测定丁腈橡胶硫化胶交联密度
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2022-01-01 DOI: 10.1590/0104-1428.20220031
G. N. Campos, A. R. Coimbra, A. A. Silva, E. V. D. Rocha, F. N. Linhares, C. Furtado, A. M. F. Sousa
{"title":"Cross-link density measurement of nitrile rubber vulcanizates using dynamic shear test","authors":"G. N. Campos, A. R. Coimbra, A. A. Silva, E. V. D. Rocha, F. N. Linhares, C. Furtado, A. M. F. Sousa","doi":"10.1590/0104-1428.20220031","DOIUrl":"https://doi.org/10.1590/0104-1428.20220031","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Cellulose nanocrystals into Poly(ethyl methacrylate) used for dental application 纤维素纳米结晶成聚(甲基丙烯酸乙酯)用于牙科应用
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2022-01-01 DOI: 10.1590/0104-1428.20210066
A. Leite, Hamille Viotto, T. Nunes, D. Pasquini, A. Pero
{"title":"Cellulose nanocrystals into Poly(ethyl methacrylate) used for dental application","authors":"A. Leite, Hamille Viotto, T. Nunes, D. Pasquini, A. Pero","doi":"10.1590/0104-1428.20210066","DOIUrl":"https://doi.org/10.1590/0104-1428.20210066","url":null,"abstract":"","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67121347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Mechanical and thermal properties of polystyrene and medium density fiberboard composites 聚苯乙烯和中密度纤维板复合材料的机械和热性能
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2021-07-28 DOI: 10.1590/0104-1428.07120
Juliana Cristina Kreutz, P. R. Souza, Viviane Prima Benetti, A. Freitas, P. Bittencourt, L. Gaffo
{"title":"Mechanical and thermal properties of polystyrene and medium density fiberboard composites","authors":"Juliana Cristina Kreutz, P. R. Souza, Viviane Prima Benetti, A. Freitas, P. Bittencourt, L. Gaffo","doi":"10.1590/0104-1428.07120","DOIUrl":"https://doi.org/10.1590/0104-1428.07120","url":null,"abstract":"Abstract Virgin polystyrene (PS) composites were reinforced with medium density fiberboard (MDF) residue, considering the influence of fiber content. The composites were evaluated for their morphology, identification of functional groups and thermal behavior. Mechanical tests and a degradation study under ultraviolet radiation (UV) were also performed. The results showed that the best properties were obtained for composites with 4% by mass of MDF waste. The addition of residue was found to increase thermal stability of polystyrene compared to its pure form. The morphology of the composites showed homogeneity of the material. In the degradation tests under ultraviolet (UV) radiation, it was found that the presence of MDF residue slows down the matrix degradation process when evaluated by means of tensile strength. Polystyrene composites reinforced with MDF residues showed good mechanical properties and can be applied in the development of materials that do not need a good appearance.","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45895779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Development of a bio-based adhesive from Protium heptaphyllum resin 由七叶蛋白树脂制备生物基胶粘剂
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2021-07-28 DOI: 10.1590/0104-1428.10020
M. D. C. D. Almeida, João Paulo Teixeira da Silva, Felipe Fernando da Costa Tavares, Ludmila Leite Araujo, Jefferson de Souza Zeferino, R. Santana
{"title":"Development of a bio-based adhesive from Protium heptaphyllum resin","authors":"M. D. C. D. Almeida, João Paulo Teixeira da Silva, Felipe Fernando da Costa Tavares, Ludmila Leite Araujo, Jefferson de Souza Zeferino, R. Santana","doi":"10.1590/0104-1428.10020","DOIUrl":"https://doi.org/10.1590/0104-1428.10020","url":null,"abstract":"Abstract In this work, a bio-based adhesive is prepared from Protium heptaphyllum resin. The resin is first characterized by 1H and 13C nuclear magnetic resonance spectroscopy and the bioadhesive is then prepared using a simple mixture of the resin with linseed oil, catalyzed by cobalt octanoate, to induce crosslinking. The precursors and bioadhesive obtained are characterized by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). The NMR analysis shows the presence of groups of triterpenes, such as α- and β-amyrins, and diols, such as brein and maniladiol. Thermogravimetric analysis reveals that the resin has less thermal stability than the bioadhesive. Mechanical tests indicate that the bioadhesive has greater adhesion strength compared to the commercial adhesive, reaching an average stress at break of 7.66 and 0.113 MPa for the wood and carbon steel substrates, respectively. In conclusion, the bioadhesive can be used for the production of composites.","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46001804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Extraction and characterization of nanofibrillated cellulose from yacon plant (Smallanthus sonchifolius) stems 矢车菊茎中纳米纤维纤维素的提取与表征
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2021-07-28 DOI: 10.1590/0104-1428.09620
R. S. D. Sousa, A. S. D. Andrade, M. L. Masson
{"title":"Extraction and characterization of nanofibrillated cellulose from yacon plant (Smallanthus sonchifolius) stems","authors":"R. S. D. Sousa, A. S. D. Andrade, M. L. Masson","doi":"10.1590/0104-1428.09620","DOIUrl":"https://doi.org/10.1590/0104-1428.09620","url":null,"abstract":"Abstract This study aimed to evaluate the process of cellulose extraction from yacon stem using combined pulping and bleaching processes to produce nanofibrillated cellulose (NFC). First, a chemical pulping process with NaOH was applied and, subsequently, the pulp obtained was bleached. From the chemical pulp (CP) bleached, NFC was obtained by the mechanical defibrillation in a colloidal grinder. Then, chemical composition, and infrared analysis of the pulps were performed. The pulping process showed a lower amount of extractives and lignin content, as a low yield and an excessively dark pulp. The CP bleached with NaClO2 showed the best results increased whiteness of the pulp. A suspension of NFC with fibers of 5-60 nm in diameter, high crystallinity index, and thermal stability was obtained. The results are promising and demonstrate the technical feasibility of obtaining NFC from yacon stems waste which is ideal to apply to other materials of the industry.","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41446477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A foldable high transparent fluorinated polyimide (HFBAPP/6FDA) film material for transparent flexible substrate 一种可折叠的高透明氟化聚酰亚胺(HFBAPP/6FDA)薄膜材料，用于透明柔性基板
IF 1.3 4区 化学
Polimeros-ciencia E Tecnologia Pub Date : 2021-05-31 DOI: 10.1590/0104-1428.10520
Chuanhao Cao, Lizhu Liu, Xiaorui Zhang
{"title":"A foldable high transparent fluorinated polyimide (HFBAPP/6FDA) film material for transparent flexible substrate","authors":"Chuanhao Cao, Lizhu Liu, Xiaorui Zhang","doi":"10.1590/0104-1428.10520","DOIUrl":"https://doi.org/10.1590/0104-1428.10520","url":null,"abstract":"Abstract Flexible transparent substrate materials, which was able to withstand high dynamic strain, in contrast to traditional substrate materials. A flexible and transparent material with advantages including transparency, stable size, and excellent corrosion and electrical resistance was provided. The polyimide(PI) film was prepared by introducing a structure with a high content of F atom and a fine optimization process to enhance the various properties of the film. However, the properties of the films were optimized effectively by gradient vacuum and secondary dissolution so that the film had a transmittance at 400 nm of 82%. The films with low dielectric constant and low dielectric loss represent the breakdown strength of 202 kV/mm. The glass transition temperature of the film was 267 °C, and the thermal expansion coefficient was 35ppm/k (30 °C~270 °C), indicated outstanding thermal dimensional stability. Therefore, this polyimide film was an optoelectronic device with extremely high application potential on the folding mobile phone and the PI film is the finest materials of screen.","PeriodicalId":20282,"journal":{"name":"Polimeros-ciencia E Tecnologia","volume":"121 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73217585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信