Cellular Polymers最新文献_第6页

Optimization of structural parameters on hollow spherical cells manufactured by Fused Deposition Modeling (FDM) using Taguchi method 采用田口法对FDM空心球胞的结构参数进行优化

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-09-01 DOI: 10.1177/02624893211043324

N. B. Ali, M. Khlif, D. Hammami, C. Bradai

{"title":"Optimization of structural parameters on hollow spherical cells manufactured by Fused Deposition Modeling (FDM) using Taguchi method","authors":"N. B. Ali, M. Khlif, D. Hammami, C. Bradai","doi":"10.1177/02624893211043324","DOIUrl":"https://doi.org/10.1177/02624893211043324","url":null,"abstract":"There is a growing need for 3D printing of polymer structures in a cost-effective way and green. This study presents an experimental approach to investigate structural parameters effects on mechanical properties of polylactic acid (PLA) hollow-sphere structures manufactured with fused deposition modeling (FDM). The mechanical behavior characteristics of square_hexagonal stacking, closed_open porosity and parallel_perpendicular compression direction compared to the direction of manufacture under quasi-static uniaxial compression are examined using Taguchi method. The S/N ratio analysis and the Analysis of Variance (ANOVA) were used to find the optimal parameters that improve the mechanical properties (Young modulus, yield strength) and to provide a significant ranking of the different parameters analyzed in this paper. It was found that the optimum level and significance of each process parameter vary for “hexagonal cells,” “open porosity” and “parallel direction.” The optimal values of the results give a Young modulus E of 90.12 MPa and a yield strength σ y of 3 MPa. Furthermore, the experimental results further reveal that the porous structure with the loading direction that is parallel to the direction of manufacture, has a higher strength and a progressive collapse of the cells to those with a perpendicular direction.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"3 - 20"},"PeriodicalIF":1.6,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44865241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Morphological evaluation of microcellular foamed composites developed through gas batch foaming integrating Fused Deposition Modeling (FDM) 3D printing technique 集成熔融沉积建模（FDM）3D打印技术的气批发泡微孔发泡复合材料的形态评价

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-08-24 DOI: 10.1177/02624893211040938

G. Radhakrishna, Rupesh Dugad, A. Gandhi

{"title":"Morphological evaluation of microcellular foamed composites developed through gas batch foaming integrating Fused Deposition Modeling (FDM) 3D printing technique","authors":"G. Radhakrishna, Rupesh Dugad, A. Gandhi","doi":"10.1177/02624893211040938","DOIUrl":"https://doi.org/10.1177/02624893211040938","url":null,"abstract":"In this article, the development of microcellular structure foams has developed by integrating the two successful and existing technologies, namely CO2 gas batch foaming and Fused Deposition Modeling (FDM) 3D printing technique. It is a novel approach to manufacture complex design porous products for customized applications. The eventual cell morphologies of the extruded 3D printing filament depends on the process parameters pertaining to both microcellular foaming and 3D printing processes. Further, morphological study has been conducted to evaluate the cell morphologies of the 3D printing filament developed through customized FDM setup. During this process, the significance of various process parameters including saturation pressure, saturation time, desorption time, feed rate and extrusion temperature were thoroughly studied. To pursue this study base material used was acrylonitrile butadiene styrene (ABS). The 3D printed filaments consisted of cells with an average cell size in the range of 2.3–276 µm and the average cell density in the range of 4.7 × 104 to 4.3 × 109 cells/cm3. Finally, it has found that by controlling the process parameters different cell morphologies can be developed as per the end application.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"40 1","pages":"244 - 266"},"PeriodicalIF":1.6,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47959853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Development and investigation of the applicability of microstructural models for polymeric low density foams directly obtained from computed tomography data 从计算机断层扫描数据直接获得的聚合物低密度泡沫微观结构模型的发展和适用性研究

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-08-24 DOI: 10.1177/02624893211041674

Anna Hössinger-Kalteis, J. Maurer, M. Reiter, M. Jerabek, Z. Major

引用次数: 2

A study on fabrication of nanocomposite polyethylene foam through extrusion foaming procedure 挤出发泡法制备纳米复合聚乙烯泡沫材料的研究

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-08-20 DOI: 10.1177/02624893211040949

M. Rostami, T. Azdast, R. Hasanzadeh, M. Moradian

{"title":"A study on fabrication of nanocomposite polyethylene foam through extrusion foaming procedure","authors":"M. Rostami, T. Azdast, R. Hasanzadeh, M. Moradian","doi":"10.1177/02624893211040949","DOIUrl":"https://doi.org/10.1177/02624893211040949","url":null,"abstract":"Foaming a polymer not only turns it into a lightweight material but also gives some special properties to it. However, the most important issue is controlling the foaming process to achieve a desirable structure with high cell density and low relative density. In the present study, the extrusion foaming process of polyethylene was studied through stepwise amendments. An innovative extrusion system was designed and implemented to produce extrusion foams under different material and process conditions using N2 as blowing agent. In the first step, the final cooling condition was investigated. The air-cooling condition led to a higher cell density/lower cell size compared to the water-cooling condition although a higher relative density was obtained. In the second step, the effects of the addition of talc and the synergetic effect of talc/nanoclay at different contents were investigated in detail. The hybrid of talc/nanoclay had a noticeably improving effect on the cellular structure. In the third step, the effects of processing parameters including the die temperature and screw speed were studied on the foam properties. Finally, up to 49.4% decrease in the relative density of samples was observed, also cell densities up to 2.5 × 104 cell/cm3 and cell sizes as small as 280 µm were achieved.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"40 1","pages":"231 - 243"},"PeriodicalIF":1.6,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47333762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

An efficient and environment friendly bio-based polyols through liquefaction: Liquefaction temperature and catalyst concentration optimization and utilized for rigid polyurethane foams 一种高效环保的液化生物基多元醇：液化温度和催化剂浓度的优化及其在硬质聚氨酯泡沫中的应用

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-05-28 DOI: 10.1177/02624893211017271

C. Patel, Nikhil R Dhore, Amit A. Barot, Raju V. S. N. Kothapalli

{"title":"An efficient and environment friendly bio-based polyols through liquefaction: Liquefaction temperature and catalyst concentration optimization and utilized for rigid polyurethane foams","authors":"C. Patel, Nikhil R Dhore, Amit A. Barot, Raju V. S. N. Kothapalli","doi":"10.1177/02624893211017271","DOIUrl":"https://doi.org/10.1177/02624893211017271","url":null,"abstract":"Aiming towards the liquefaction of paddy straw was accumulation as well as providing a technically viable route leading to preservation of the natural resources and environment, the paddy straw was chemically liquefied. Paddy straw were liquefied into bio-based polyol in the presence of castor oil and blend of castor and karanja oil as depolymerizing agent and P-Toluene sulfonic acid as catalyst. Liquefied product was characterized by chemical as well as analytical techniques. The agricultural waste base paddy straw was eventually converted into polymeric precursor (polyol) monomer with nearly 80 to 95% yield by employing 2% catalyst concentration and at optimized temperature of 180°C. Synthesized polyol can be utilized further in formulating high quality rigid polyurethane foams. The foams were characterized in terms of their physical, mechanical, thermal and morphological properties. All foams exhibit good compressive strengths and thermal stability. Thermal conductivity of foams varied between 0.012 and 0.023 Kcal/mh°C, with the lowest being of foam from liquefied (LP), making it suitable for utilization as an insulation material.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"40 1","pages":"212 - 227"},"PeriodicalIF":1.6,"publicationDate":"2021-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/02624893211017271","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42008508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Morphological, thermal and mechanical properties of polypropylene foams via rotational molding 通过旋转模塑聚丙烯泡沫塑料的形态、热学和机械性能

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-05-25 DOI: 10.1177/02624893211018825

Y. Dou, D. Rodrigue

引用次数: 5

Preparation and performance of melamine-formaldehyde rigid foams with high closed cell content 高闭孔含量三聚氰胺甲醛硬质泡沫塑料的制备及性能

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-05-17 DOI: 10.1177/02624893211017130

Chunhui Li, Haihong Ma, Cong Song, Zhengfa Zhou, Weibing Xu, Qiusheng Song, F. Ren

{"title":"Preparation and performance of melamine-formaldehyde rigid foams with high closed cell content","authors":"Chunhui Li, Haihong Ma, Cong Song, Zhengfa Zhou, Weibing Xu, Qiusheng Song, F. Ren","doi":"10.1177/02624893211017130","DOIUrl":"https://doi.org/10.1177/02624893211017130","url":null,"abstract":"Melamine-formaldehyde (MF)rigid foams with high closed cell content were prepared via oven heating process, using MF prepolymer prepared from melamine and paraformaldehyde as a matrix, cyclohexane as the foaming agent, dimethyl silicon oil as the foam stabilizers, hydrochloric acid as the catalyst. The effect of MF prepolymer viscosity, foaming temperature, amount of catalyst on morphology, closed cell content, apparent density, water absorption and compressive strength of MF rigid foams were systematically studied. The optimized foaming conditions are as follows: the viscosity of MF prepolymer ranges from 35 Pa·s to 45 Pa·s, the foaming temperature is 125°C and the content of the catalyst is 0.65 wt%. The as-prepared MF foams showed the best comprehensive performance with closed cell content of 83.5%, apparent density of 62 kg·m−3, water absorption of 12.0%, compressive strength of 292kPa, thermal conductivity of 0.033 W m−1 K−1 and limiting oxygen index (LOI) of 36%. Compared to conventional organic foams, MF rigid foams possess low water absorption, excellent thermal insulation and flame retardancy due to high closed cell content, and can be expected to be used as thermal insulation material for building exterior walls.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"40 1","pages":"183 - 197"},"PeriodicalIF":1.6,"publicationDate":"2021-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/02624893211017130","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49442641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effect of multi-walled carbon nanotubes with different diameters on morphology and thermal and mechanical properties of flexible polyurethane foams 不同直径的多壁碳纳米管对柔性聚氨酯泡沫形态及热力学性能的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-05-13 DOI: 10.1177/02624893211017284

Fukai Yang, Miao Xie, Zhang Yudi, Xinyu Xu

{"title":"Effect of multi-walled carbon nanotubes with different diameters on morphology and thermal and mechanical properties of flexible polyurethane foams","authors":"Fukai Yang, Miao Xie, Zhang Yudi, Xinyu Xu","doi":"10.1177/02624893211017284","DOIUrl":"https://doi.org/10.1177/02624893211017284","url":null,"abstract":"We report flexible polyurethane foams (PUFs) containing –OH functionalized multi-walled carbon nanotubes (MWCNTs) with different diameters (10–20 nm, 20–30 nm, >50 nm) from 0.1–0.6 wt% (per 100 resins of polyol by weight) prepared via in situ polymerization. After synthesis, the morphology of the MWCNT/PUF composites was observed through scanning electron microscopy (SEM) based on MWCNT amount. The MWCNTs acted as nucleating agents and increased the matrix viscosity. The pore size of the composites decreased and the number of pores increased with increasing MWCNT concentration. Dynamic mechanical analysis (DMA) showed that the storage modulus of the composites increased, the loss modulus decreased, and the Tg gradually decreased with increasing MWCNT content. The incorporation of MWCNTs induced remarkable thermal stabilization of the matrix. The increase in the degradation temperature from 294°C to 304°C resulted in a 50% weight loss. The mechanical properties of the MWCNT/PUF materials increased with increasing MWCNT proportion because of the excellent compatibility and strong interface interaction between the MWCNT and flexible PUF.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"40 1","pages":"165 - 179"},"PeriodicalIF":1.6,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/02624893211017284","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44908253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Characterization of microstructures of SAN foam core using micro-computed tomography 用微计算机断层扫描表征SAN泡沫芯的微结构

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-04-05 DOI: 10.1177/02624893211006879

Youming Chen, R. Das, Hui Wang, M. Battley

{"title":"Characterization of microstructures of SAN foam core using micro-computed tomography","authors":"Youming Chen, R. Das, Hui Wang, M. Battley","doi":"10.1177/02624893211006879","DOIUrl":"https://doi.org/10.1177/02624893211006879","url":null,"abstract":"In this study, the microstructure of a SAN foam was imaged using a micro-CT scanner. Through image processing and analysis, variations in density, cell wall thickness and cell size in the foam were quantitatively explored. It is found that cells in the foam are not elongated in the thickness (or rise) direction of foam sheets, but rather equiaxed. Cell walls in the foam are significantly straight. Density, cell size and cell wall thickness all vary along the thickness direction of foam sheets. The low density in the vicinity of one face of foam sheets leads to low compressive stiffness and strength, resulting in the strain localization observed in our previous compressive tests. For M80, large open cells on the top face of foam sheets are likely to buckle in compressive tests, therefore being another potential contributor to the strain localization as well. The average cell wall thickness measured from 2D slice images is around 1.4 times that measured from 3D images, and the average cell size measured from 2D slice images is about 13.8% smaller than that measured from 3D images. The dispersions of cell wall thickness measured from 2D slice images are 1.16–1.20 times those measured from 3D images. The dispersions of cell size measured from 2D slice images are 1.12–1.36 times those measured from 3D images.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"40 1","pages":"143 - 164"},"PeriodicalIF":1.6,"publicationDate":"2021-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/02624893211006879","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42885065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of carbon nanotubes on the properties of biopolyol based polyurethane foams 碳纳米管对生物多元醇基聚氨酯泡沫性能的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-03-01 DOI: 10.1177/0262489321989005

Rujuta Dhoke, A. Ojha, A. Chaudhary, R. Vijayakumar

{"title":"Influence of carbon nanotubes on the properties of biopolyol based polyurethane foams","authors":"Rujuta Dhoke, A. Ojha, A. Chaudhary, R. Vijayakumar","doi":"10.1177/0262489321989005","DOIUrl":"https://doi.org/10.1177/0262489321989005","url":null,"abstract":"Biopolyols were obtained from liquefaction of sugarcane bagasse and rice husk. Acid and hydroxyl numbers were determined for estimating the polyol value of the liquid products. These prepared biopolyols were mixed with the commercial polyol for the preparation of polyurethane foam (PU). To study the effects of biopolyol on properties of PU foam, various ratios of biopolyol to commercial polyol were used. It was observed that the density and foaming time of the PU foam increases with the increase in biopolyol content. The calculated Isocyanate index showed that sugarcane bagasse polyol can be used to make flexible foam and that rice husk can be used to make rigid foam. Foaming times and full rise times increased with increase in the biopolyol content. The Fourier-transform infrared spectroscopy (FTIR) spectra of prepared foams showed the characteristic peaks related to PU foam. The morphological studies were carried out using scanning electron microscopy (SEM). Thermal conductivity tests proved that the synthesized PU foams can be used as insulating materials. Further, PU foams were also prepared with the incorporation of carbon nanotubes (CNTs) in the polyol. The densities, thermal conductivities and SEM analysis of PU foams with and without carbon nanotubes were compared.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"40 1","pages":"73 - 86"},"PeriodicalIF":1.6,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489321989005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45731584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1