Polymers and Polymer Composites最新文献_第9页

Preparation of a novel superabsorbent hydrogel based on polyacrylic acid/shellac using gamma irradiation for adsorption removal of malachite green dye 以聚丙烯酸/紫胶为基料的新型高吸水性水凝胶的制备及其对孔雀石绿染料的吸附

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221074435

M. Elhady, I. Mousaa, R. M. Attia

{"title":"Preparation of a novel superabsorbent hydrogel based on polyacrylic acid/shellac using gamma irradiation for adsorption removal of malachite green dye","authors":"M. Elhady, I. Mousaa, R. M. Attia","doi":"10.1177/09673911221074435","DOIUrl":"https://doi.org/10.1177/09673911221074435","url":null,"abstract":"The objective of this study is to prepare a super absorbent hydrogel based on polyacrylic acid and an environmentally friendly material such as shellac to remove malachite green dye from aqueous solution using gamma radiation. The adsorption of malachite green (MG) dyes using polyacrylic acid (PAA)/shellac (SH) hydrogels was studied. These hydrogels were prepared by mixing aqueous solutions of PAA and SH at differing molecular ratios (10%, 20%, and 30% SH content in the final reaction mixture) and varying doses of gamma radiation (10–50 kGy). The water absorption by the PAA/SH hydrogels prepared at a 30-kGy radiation dose increased with an increase in the SH content. The removal of the MG dyes from an aqueous solution using PAA and PAA/SH hydrogels was investigated at different values for selected parameters, such as pH, contact time, SH concentration, and adsorbent dosage. The highest MG adsorption percentage (95.5%) was obtained for the PAA/SH hydrogel with the highest SH content (30%). As the adsorbent dosage increased, the dye adsorption capacity increased, accordingly. The combination of SH and gamma radiation caused the PAA to undergo structural changes verified by X-ray diffraction and Fourier transform infrared spectroscopy. Scanning electron microscopy was employed to investigate the morphology of the PAA/SH hydrogel and revealed that the SH belonging to the PAA matrixes exhibited a homogeneous dispersion. The thermal stability of the hydrogels was investigated by thermogravimetric analysis. The amount of dye adsorbed by the PAA/SH hydrogel was calculated by subtraction based on the ultraviolet–visible (UV–VIS) spectroscopy determination of the concentration of leftover dye in solution using a UV–VIS spectrophotometer.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74272035","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: 7

Effect of surface roughness of electroplating chromium coated steel on bonding strength of polymer coated steel 电镀铬涂层钢表面粗糙度对聚合物涂层钢结合强度的影响

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221102128

Qingdong Zhang, Mingyang Yu, Boyang Zhang, Hao Li

引用次数: 0

Fabrication of highly efficient nano core–shell structure for the development of super-hydrophobic polymeric coating on mild steel 用于软钢超疏水聚合物涂层的高效纳米核壳结构的制备

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221087835

Jaya Verma, Deepak Kumar, BS Sikarwar

{"title":"Fabrication of highly efficient nano core–shell structure for the development of super-hydrophobic polymeric coating on mild steel","authors":"Jaya Verma, Deepak Kumar, BS Sikarwar","doi":"10.1177/09673911221087835","DOIUrl":"https://doi.org/10.1177/09673911221087835","url":null,"abstract":"This research work deals with the development of a polymeric super-hydrophobic surface involving nano silica–titania core–shell particles. This core–shell structure enhanced the properties of two different materials in a single nanoparticle in an outstanding manner; polymeric coatings containing core silica and shell titania have improved the mechanical behavior and hydrophobicity of coating surfaces, respectively. This nano core–shell was synthesized through two different methodologies which were prepared at high and low processing temperature separately, that is, called sol–gel and peptization synthesis. Further surface properties of the prepared nanoparticles were investigated individually in solvent-based emulsions and water-based emulsions. Nanocoating formulations were developed on mild steel substrate for analysis on the mechanical behavior of the coating and contact angle measurement. In the coating formulation, nano core–shell concentrations ranged from 1% (wt) to 6% (wt), and used nanoparticles were functionalized with methyl trimethoxy silane for better surface properties. Based on the results of the experiment, core–shell nanocoatings have been found mechanically robust and superhydrophobic (∼145.1° ± 2°) coating.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74434221","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: 5

The effects of drilling parameters on thrust force, temperature and hole quality of glass fiber reinforced polymer composites 钻孔参数对玻璃纤维增强聚合物复合材料推力、温度和成孔质量的影响

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221131113

Khurshid Malik, F. Ahmad, Woo Tze Keong, Ebru Gunister

引用次数: 3

Enhanced mechanical and dynamic mechanical properties of polymer nanocomposites containing carbon nanotubes decorated with barium titanate 钛酸钡修饰碳纳米管聚合物纳米复合材料的力学和动态力学性能

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221100160

U. O. Uyor, P. Popoola, O. Popoola

{"title":"Enhanced mechanical and dynamic mechanical properties of polymer nanocomposites containing carbon nanotubes decorated with barium titanate","authors":"U. O. Uyor, P. Popoola, O. Popoola","doi":"10.1177/09673911221100160","DOIUrl":"https://doi.org/10.1177/09673911221100160","url":null,"abstract":"This study presents functionalized carbon nanotubes (CNTs) decorated with functionalized barium titanate (BT) (denoted as BT@CNTs) via hydrothermal and self-assembly methods to improve dispersion in polypropylene (PP) matrix with enhanced thermal, mechanical, and thermomechanical properties. The CNTs, BT, and BT@CNTs with the addition of polypropylene maleic anhydride (PPMA) compatibilizer were used in the fabrication of the PP based nanocomposites for this study via solution mixing and melt compounding. FTIR, TEM, and SEM analyses, respectively revealed that the nanoparticles were successfully functionalized, CNTs decorated with BT, and well dispersion in the PP matrix. PP/BT@CNTs-based nanocomposite showed optimal tensile strength, modulus, heat deflection, and thermal stability of about 16.8%, 26.5%, 20.1%, and 30oC higher than that obtained for the pure PP. These properties were also respectively 10.6%, 17.6%, 19.0%, and 5.0oC higher than PP/3CNTs nanocomposite when compared to PP/3BT@CNTs. The PP/BT@CNTs based nanocomposites also revealed enhanced dynamic mechanical properties. The better performance in the measured properties of PP/BT@CNTs compared to pure PP and PP/CNTs were attributed to their uniform microstructures, effective interlocking of the PP matrix due to the presence of BT on CNTs surfaces.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81414783","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: 1

Vibrations of composite structures: Finite element and analytical investigation 复合材料结构的振动:有限元和分析研究

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221112956

Ashkan Farazin, Chunwei Zhang, A. Abed

{"title":"Vibrations of composite structures: Finite element and analytical investigation","authors":"Ashkan Farazin, Chunwei Zhang, A. Abed","doi":"10.1177/09673911221112956","DOIUrl":"https://doi.org/10.1177/09673911221112956","url":null,"abstract":"In this examination, the free vibrations of complete composite shells with rectangular openings based on first-order shear deformation theory have been studied. The equations are generally written in such a way that they can be converted to any of Donnell, Love, or Sanders theories. To study the shell with the opening of the problem-solving space, it is elementalized in such a way that the boundary conditions and loading are uniform at the edges of each element. For each element, the governing equations, the boundary conditions of the edges, and the compatibility conditions at the common boundary of the adjacent elements are discretized by the generalized differential quadrature method in the longitudinal and peripheral directions, and by assembling them, a system of algebraic equations is formed. Finally, the natural frequency of the structure is calculated using the solution of the eigenvalue. To validate this method, the results are compared with the results of some articles as well as the results of Abaqus finite element software. After ensuring the efficiency of the present method, it has been used to study the effect of different parameters on the vibrational behavior of shells with and without apertures. These studies show that relatively small openings (c/L <0.3) have little effect on the natural frequency of the shell, regardless of the material and the porcelain layer of the shell. While reducing the ratio of length to radius or increasing the thickness of the shell is also effective in reducing the effects of opening. In addition, the effect of peripheral openings is far less than longitudinal openings.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85282928","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: 4

Mechanical behaviour of carbon fibre reinforced polymer composite material at different temperatures: Experimental and model assessment 碳纤维增强聚合物复合材料在不同温度下的力学行为:实验和模型评估

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221125072

G. Tefera, S. Adali, Glen Bright

{"title":"Mechanical behaviour of carbon fibre reinforced polymer composite material at different temperatures: Experimental and model assessment","authors":"G. Tefera, S. Adali, Glen Bright","doi":"10.1177/09673911221125072","DOIUrl":"https://doi.org/10.1177/09673911221125072","url":null,"abstract":"In the present study, temperature and frequency effects are studied involving carbon fibre reinforced polymeric materials with unidirectional fibers. Before testing, laminates were preserved in a deep freezer at −80, −20, 0, and 25°C for 60 days. Compressive, tensile, and stiffness behaviors of the laminates were assessed. The results confirmed that the compressive strength, tensile strength, and tensile modulus of laminates severely deteriorate at high temperatures. This might happen because of the weakening of the fibre/matrix interface, resulting in the load-carrying capacity of the carbon fibre being severely reduced. Lower temperatures did not significantly affect the mechanical performance of the laminates. This is due to minor deformation of the frozen laminates and closely compacted epoxy chain segments. The effects of temperature and vibration on the storage modulus, loss modulus, and damping behaviour of laminates are discussed. The results confirm that a reduction in mechanical performance is a strongly temperature-dependent phenomenon. Laminate damping properties are also evaluated. According to the results of the experiments, −80°C has the greatest permanence. Finally, the accuracy of the results on storage modulus was compared with empirical models. The model suggested by Gibson et al. provided the most accurate estimates for the storage modulus of the laminates. Other models were less accurate and gave non-conservative estimates.","PeriodicalId":20417,"journal":{"name":"Polymers and Polymer Composites","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77426989","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

Multiwalled carbon nanotubes reinforced flexible blend nanocomposites membranes for pervaporation separation of aromatic-aliphatic mixtures 多壁碳纳米管增强柔性共混纳米复合材料膜用于芳香-脂肪族混合物的渗透汽化分离

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911211069009

S. Thomas, Shaji P. Thomas, Sujit A. Kadam, Thomasukutty Jose, Jiji Abraham, S. C. George, Sabu Thomas

引用次数: 1

Improved ablation resistance and thermal insulation performances of polyimide composites by introducing albite/glass powder composition 引入钠长石/玻璃粉，提高了聚酰亚胺复合材料的抗烧蚀性能和保温性能

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221087806

Q. Xu, Y. Li, F. Zeng, Yifan Zhang, Pengyang Deng, Zhongmin Su

引用次数: 3

Enhanced energy storage performance of poly(vinylidene fluoride)-based polymer blends via post-treatments 通过后处理提高聚偏氟乙烯基聚合物共混物的储能性能

Polymers and Polymer Composites Pub Date : 2022-01-01 DOI: 10.1177/09673911221099775

Zhong Yang, Jing Wang, Y. Hu, Chaoyong Deng, K. Zhu

引用次数: 2