International Polymer Processing最新文献_第2页

Melting mechanisms in corotating twin-screw extrusion: a critical review 旋转双螺杆挤压的熔化机制:综述

4区工程技术

International Polymer Processing Pub Date : 2023-10-27 DOI: 10.1515/ipp-2023-4414

Bruno Vergnes

引用次数: 0

Analyzing pellet agglomeration in underwater polymer extrusion pelletizers: a numerical simulation study 水下聚合物挤压造粒机中颗粒团聚分析:数值模拟研究

4区工程技术

International Polymer Processing Pub Date : 2023-09-29 DOI: 10.1515/ipp-2023-4404

Bebhash S. Raj, Abhilash J. Chandy

{"title":"Analyzing pellet agglomeration in underwater polymer extrusion pelletizers: a numerical simulation study","authors":"Bebhash S. Raj, Abhilash J. Chandy","doi":"10.1515/ipp-2023-4404","DOIUrl":"https://doi.org/10.1515/ipp-2023-4404","url":null,"abstract":"Abstract The production of thermoplastic pellets using underwater die-face pelletizers is a widespread process in the thermoplastics compounding industry. One major challenge in this process is pellet agglomeration, which occurs when the polymer is pliable or easily deformed under heat. To tackle this issue, the non-Newtonian flow of a polymer, along with the turbulent flow of heating oil and heat transfer through the die, are modeled using three-dimensional (3D) computational fluid dynamics (CFD) calculations in ANSYS Fluent. The computational model is validated by comparing its predictions of temperature and pressure using two models with and without a slip method, to experimental measurements from an industrial-scale pelletizer, resulting in a maximum error of <3 % for temperature and <16 % for pressure. The efficiency of the underwater die pelletizer is typically evaluated based on the rate at which it produces pellets. Minor variations in operational parameters, such as the inlet mass flow rate and temperature of the polymer, the temperature of the heating oil, and the water temperature, can greatly affect the quality of the final product. Firstly, contours of pressure, velocity and temperature are presented to understand their impact on pellet agglomeration. However, to more specifically link pellet quality, i.e. pellet agglomeration rate, to the input conditions, the study develops a non-dimensional parameter called the pellet agglomeration number (PAN), as a non-linear function of three other non-dimensional numbers: Reynolds number, Euler number, and a non-dimensional temperature. The values of PAN at the exit and inlet are shown to correlate well with the experimentally measured pellet agglomerations, thereby demonstrating the usefulness of PAN in not only differentiating between good and bad pellet quality but also determining apriori the appropriate operating conditions leading to fewer pellet agglomerations in commercial pelletizers.","PeriodicalId":14410,"journal":{"name":"International Polymer Processing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135133230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental studies on water absorption and mechanical properties of Hibiscus s abdariffa (Roselle) and Urena lobata (Caesar weed) plant Fiber–Reinforced hybrid epoxy composites: effect of weight fraction of nano-graphene fillers 木槿和花楸植物纤维增强杂化环氧复合材料的吸水性能和力学性能实验研究:纳米石墨烯填料重量分数的影响

4区工程技术

International Polymer Processing Pub Date : 2023-09-22 DOI: 10.1515/ipp-2023-4398

Mani Sasi Kumar, Selvaraj Sathish, Mani Makeshkumar, Sivanantham Gokulkumar

{"title":"Experimental studies on water absorption and mechanical properties of Hibiscus s abdariffa (Roselle) and Urena lobata (Caesar weed) plant Fiber–Reinforced hybrid epoxy composites: effect of weight fraction of nano-graphene fillers","authors":"Mani Sasi Kumar, Selvaraj Sathish, Mani Makeshkumar, Sivanantham Gokulkumar","doi":"10.1515/ipp-2023-4398","DOIUrl":"https://doi.org/10.1515/ipp-2023-4398","url":null,"abstract":"Abstract This study aimed to develop novel hybrid composites with graphene (Gr) fillers incorporated in the epoxy (E) matrix with Caesar weed fiber (CF), and roselle fiber (RF) as reinforcements. Compression molding methods were used to fabricate hybrid composite materials with a variable-weight graphene filler in a constant fiber epoxy matrix. On the basis of the results, the mechanical characteristics of the composite with 6 wt% Gr exhibited the greatest flexural strength, tensile strength, and impact strength. This occurred because 6 wt% Gr particles are more uniformly dispersed in an epoxy matrix, resulting in better compatibility between reinforcement and matrix, thus increasing the mechanical properties. The composite with 8 wt% Gr filler reinforcement had the maximum hardness rating and the lowest percentage of water absorption. According to the results, adding graphene fillers to the CF/RF/E composite significantly improved the mechanical and water absorption performances. Scanning electron microscopy was used to examine the surfaces of the fabricated samples. The weight fraction of the graphene filler was optimized to enhance the mechanical properties of the composite for use in various engineering applications, such as automobile, defense, marine, sports, and musical instruments.","PeriodicalId":14410,"journal":{"name":"International Polymer Processing","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136011689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 fiber content and aspect ratio on anisotropic flow front and fiber orientation for injection-molded fiber composites 纤维含量和长径比对注射成型纤维复合材料各向异性流动前沿和纤维取向的影响

4区工程技术

International Polymer Processing Pub Date : 2023-09-22 DOI: 10.1515/ipp-2023-4386

Huan-Chang Tseng

{"title":"The effect of fiber content and aspect ratio on anisotropic flow front and fiber orientation for injection-molded fiber composites","authors":"Huan-Chang Tseng","doi":"10.1515/ipp-2023-4386","DOIUrl":"https://doi.org/10.1515/ipp-2023-4386","url":null,"abstract":"Abstract In state-of-the-art predictive engineering software for injection molded fiber composites, it is challenging to discuss the effect of fiber properties, including fiber content and aspect ratio, on the shell-core fiber orientation and anisotropic flow front. Recently, the flow-fiber coupled model of informed isotropic (IISO) viscosity was proposed for simulating the realistic flow-induced fiber orientation. At present, one attempts to improve the IISO viscosity in relation to fiber content and aspect ratio. Therefore, injection molding simulations of 30 wt% and 50 wt% short glass fiber-reinforced Polyamide66 (30 wt% SGF/PA66 and 50 wt% SGF/PA66) are performed in the IISO flow-fiber couple 3D-FVM (three-dimensional finite volume method) computation under the fixed aspect ratio of a r = 20. As a result, the predicted fiber orientation distributions are in good agreement with related experimental data, while the core width is increased with fiber contents. In addition, the anisotropic ear flow occurs at the higher content. Based on shear viscosity of 30 wt% SGF/PA66, one can directly alter fiber content as 50 wt% SGF/PA66 in the IISO computation to anticipate the reliable trend of fiber orientation and flow behavior. When the a r = 20 short fiber is lengthened as the a r = 50 long fiber, the core obviously becomes the wider. It is significant to investigate the difference between the decoupled and coupled computation, as well as the influence of the flow-fiber coupled and fiber orientation model parameters.","PeriodicalId":14410,"journal":{"name":"International Polymer Processing","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136011380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of soybean oil-based polyol modified polyurethane foam from ammonium polyphosphate and its thermal stability and flame retardant properties 大豆油基聚磷酸铵改性聚氨酯泡沫的制备及其热稳定性和阻燃性能

IF 1.3 4区工程技术

International Polymer Processing Pub Date : 2023-09-08 DOI: 10.1515/ipp-2023-4399

Xu Zhang, Zhaoqian Wang, Simiao Sun, Dehe Yuan, Yueqi Wen, Zhanpeng Su, Zhi Wang, Hua Xie

{"title":"Fabrication of soybean oil-based polyol modified polyurethane foam from ammonium polyphosphate and its thermal stability and flame retardant properties","authors":"Xu Zhang, Zhaoqian Wang, Simiao Sun, Dehe Yuan, Yueqi Wen, Zhanpeng Su, Zhi Wang, Hua Xie","doi":"10.1515/ipp-2023-4399","DOIUrl":"https://doi.org/10.1515/ipp-2023-4399","url":null,"abstract":"Abstract Rigid polyurethane foams (RPUFs) were prepared using biomass soybean oil-based polyol and ammonium polyphosphate (APP) as raw materials. The effects of APP on the thermal stability and combustion performance of soybean oil-based polyol-modified RPUFs were investigated by thermogravimetric analysis, pyrolysis kinetic analysis, limiting oxygen index (LOI) test, cone calorimetry (CONE), scanning electron microscopy (SEM), and smoke density (Ds). The results showed that the modified RPUF with 20 wt% APP (RPUF-S3-20) had the lowest mass loss, the highest integrated programmed decomposition temperature and the highest activation energy. In addition, RPUF-S3-20 had the lowest Ds (30.9), the highest light transmittance (61.4 %), the lowest heat release rate (602.7 kW/m2, 506.8 MJ/m2, and 847.3 kW/m2) and the total heat release (18.3 MJ/m2, 21.4 MJ/m2, and 31.4 MJ/m2), which showed that RPUF-S3-20 had good thermal stability and flame retardant performance. The current results can provide an effective reference for the preparation of environmentally friendly RPUF by bio-based modification.","PeriodicalId":14410,"journal":{"name":"International Polymer Processing","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44554113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Frontmatter 头版头条

4区工程技术

International Polymer Processing Pub Date : 2023-09-01 DOI: 10.1515/ipp-2023-frontmatter4

引用次数: 0

Study on the thermal stability and smoke suppressant effect of polyurethane foam modified by ammonium lignosulfonate 木质素磺酸铵改性聚氨酯泡沫的热稳定性及抑烟效果研究

IF 1.3 4区工程技术

International Polymer Processing Pub Date : 2023-08-18 DOI: 10.1515/ipp-2023-4378

Xu Zhang, Dehe Yuan, Simiao Sun, Zhi Wang, Hua Xie, Zhanpeng Su

引用次数: 1

Polyvinylidene fluoride/maghnite nanocomposites: fabrication and study of structural, thermal and mechanical properties 聚偏氟乙烯/磁铁矿纳米复合材料:结构、热性能和机械性能的制备和研究

IF 1.3 4区工程技术

International Polymer Processing Pub Date : 2023-07-11 DOI: 10.1515/ipp-2022-4302

Zoulikha Khiati, L. Mrah

{"title":"Polyvinylidene fluoride/maghnite nanocomposites: fabrication and study of structural, thermal and mechanical properties","authors":"Zoulikha Khiati, L. Mrah","doi":"10.1515/ipp-2022-4302","DOIUrl":"https://doi.org/10.1515/ipp-2022-4302","url":null,"abstract":"Abstract An in-depth study of polyvinylidene fluoride (PVDF) based nanocomposite systems will be the focus of this research. This polymer being hydrophobic and apolar, it will be unlikely to generate strong interactions with clay leaves called organophilic maghnite. The challenge of this study will therefore be to manage the load/polymer interfaces by using montmorillonite with specific surface treatments by adding a surfactant Cetyltrimethylammonium bromide. Therefore, a significant improvement in mechanical and thermal properties was observed. The properties of PVDFNC nanocomposites were evaluated using various physico-chemical techniques (XRD, FTIR, TGA, DSC, TEM, SEM). The results of the structural and thermal measurements carried out on these products reveal that the structural concept of the surfactant influences both the morphological profile, the thermal and mechanical properties of the nanocomposites obtained. Accelerated crystallization is observed in PVDNC nanocomposites as an effective nucleation agent, the crystals formed are predominantly β shaped and have a small number of polar α crystals. Measurements by X-ray diffraction, as well as transmission and scanning electron microscopy indicated that modified maghnite was perfectly distributed 3 % by weight in the polyvinylidene fluoride matrix. The mechanical properties of the nanocomposites were evaluated according to the filler material used and the polyvinylidene fluoride matrix.","PeriodicalId":14410,"journal":{"name":"International Polymer Processing","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48434928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Free vibration behaviour and some mechanical properties of micro particle reinforced epoxy composites 微粒增强环氧树脂复合材料的自由振动行为及某些力学性能

IF 1.3 4区工程技术

International Polymer Processing Pub Date : 2023-07-11 DOI: 10.1515/ipp-2023-4379

Meltem Ürer, Aydin Demir

{"title":"Free vibration behaviour and some mechanical properties of micro particle reinforced epoxy composites","authors":"Meltem Ürer, Aydin Demir","doi":"10.1515/ipp-2023-4379","DOIUrl":"https://doi.org/10.1515/ipp-2023-4379","url":null,"abstract":"Abstract The epoxy composite specimens of certain sizes were produced by adding graphite, silicon carbide and boron carbide microparticles separately at the rates of 5, 10 and 15 wt% to the epoxy resin. Free vibrations of these composite samples were investigated experimentally in a simple supported vibration test setup. Frequency spectrums were obtained by modal analysis method in this experimental setup. The damping ratios were calculated using the half power bandwidth method. The mechanical properties of these composite specimens were also determined by applying the tensile test. By controlling the obtained vibration values theoretically, the effects of microparticle contributions to these specimens at certain rates on natural frequency and damping properties were investigated in detail. The maximum reduction in natural frequency was observed at 5 wt% of each reinforcement. Only the first natural frequency of the 15 wt% boron carbide reinforced epoxy composite was slightly increased. The damping ratio was increased at 10 wt% graphite added and 5 wt% boron carbide added epoxy composites compared to pure epoxy, but decreased in other composite specimens.","PeriodicalId":14410,"journal":{"name":"International Polymer Processing","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47020167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical and tribological properties of snake grass fibers reinforced epoxy composites: effect of Java plum seed filler weight fraction 蛇草纤维增强环氧复合材料的力学和摩擦学性能:爪哇梅子填料重量分数的影响

IF 1.3 4区工程技术

International Polymer Processing Pub Date : 2023-07-07 DOI: 10.1515/ipp-2023-4376

Ponnusamy Natarajan, Ponnusamy Rajasekaran, M. Mohanraj, Shanmugam Devi

{"title":"Mechanical and tribological properties of snake grass fibers reinforced epoxy composites: effect of Java plum seed filler weight fraction","authors":"Ponnusamy Natarajan, Ponnusamy Rajasekaran, M. Mohanraj, Shanmugam Devi","doi":"10.1515/ipp-2023-4376","DOIUrl":"https://doi.org/10.1515/ipp-2023-4376","url":null,"abstract":"Abstract Natural fiber composite materials are able to compete with common synthetic materials in situations where the strength-to-weight ratio is important. In this study, we aim to analyze the mechanical, tribological, and surface morphology of composites fabricated from randomly oriented snake grass natural fiber with java plum seed filler. Different weight ratios of fiber to seed filler are chosen: 30:0, 28:2, 26:4, 24:6, 22:8, and 20:10. A 70 % epoxy resin was kept constant in all compositions. The fabricated hybrid composite samples were subjected to tensile, flexural, shear, Shore D hardness, water absorption, and wear tests as per ASTM standards, and the results were compared with those of snake grass mono fiber composites. The 20:10 composite has the maximum tensile strength, impact resistance, flexural strength, hardness, water absorption, and wear resistance compared to other composites. The fiber/matrix adhesion was explored using a scanning electron microscope (SEM). The 20:10 composite shows predominant mechanical and tribological characteristics, making it easier to utilize in structural and automotive applications.","PeriodicalId":14410,"journal":{"name":"International Polymer Processing","volume":" ","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44352030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1