Malaysian Journal on Composites Science and Manufacturing最新文献

{"title":"Optimization of Hot Press Parameters to Maximize the Physical and Mechanical Properties of Natural Rubber Composites for Elastomeric Mount","authors":"Anis Aqilah Abd Ghani, N. Mohamad, J. Razak, Q. Ahsan, Chang Siang Yee, Muhammad Afiq Ani, M. Teng, A. ul-Hamid","doi":"10.37934/mjcsm.1.1.2737","DOIUrl":"https://doi.org/10.37934/mjcsm.1.1.2737","url":null,"abstract":"Article history: Received 30 November 2019 Received in revised form 30 February 2020 Accepted 15 March 2020 Available online 30 March 2020 Optimum processing parameters are highly important to the performance and processability of an elastomeric mount. A commercial black natural rubber compound of an elastomeric mount investigated for the effect of curing and hot press parameters towards maximizing the physical and mechanical properties. The parameters such as the pressing temperature (140 – 180C), pressure (100-140 kg/cm2) and curing time (5 to 15 minutes) screened using a response surface methodology technique via a two level factorial design. These parameters were the independent variables and the tensile properties, hardness and density were the responses. The coefficient of determination, R2 values for all responses were very close to the unity of 0.90 – 0.99 hence almost 100% of the variation in the overall system were presented by the model. The optimum calculated values of the tested variables for the maximum physical and mechanical properties were found to be at a pressing temperature of 140 C, pressure of 140 kg/cm2 and a curing time of 15 minutes with a predicted tensile strength of 21.74 MPa and hardness of 15.43 Shore A.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126874784","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}

{"title":"Process Parameter Interaction Study for Epoxy/Kenaf Composites Preparation via Two-Level Full Factorial Approach","authors":"J. Razak, Noraina Alia Mat Noor, N. Mohamad, R. Jaafar, MohdMuzafar Ismail, R. Junid, P. Puspitasari","doi":"10.37934/mjcsm.1.1.1126","DOIUrl":"https://doi.org/10.37934/mjcsm.1.1.1126","url":null,"abstract":"2020 This study was conducted to understand the interaction involved between the process parameters of the solution mixing for the preparation of epoxy/kenaf composites via two-level full factorial approach. There are three (3) independent variables which are the kenaf fibre loadings (-5.00 wt.%; +35.00 wt.%), stirring period (-10.00 mins; +50.00 mins) and the stirring speed (-100 rpm ; +700 rpm ), involved in this work. A set of 2 3 full factorial design with three replications at a center point and no block was applied to yield a total of 11 set of experiments. The DesignExpert 6.0.8 statistical software has optimized the resulted tensile strength (TS) response as dependent variable of prepared epoxy/kenaf composites. It was found that the optimum processing parameter are at 100 rpm of stirring speed, 10 mins of the stirring period and about 5.00 wt.% of the kenaf fiber loading, with the highest coeficient of determination R 2 value of 99.9%. Fracture surface morphological observation via SEM has been performed to correlate further the interaction between the processing variables toward an optimum resulted TS response. In overall, this study has significance to facilitate manual processing of natural fiber based epoxy composite started at the early integration between the kenaf fiber as reinforcement phase and epoxy as the matrix phase, using a high speed mechanical stirrer Observation of Epoxy/Kenaf Composites For tensile fractured surface morphological observation, the scanning electron microscope (SEM), model Zeiss Evo50 was utilized. The observation using SEM was performed at 5.00 kV of an accelerating voltage. The fractured surface of selected epoxy/kenaf composite was cut and mounted on an aluminium stub with carbon tape prior of palladium-gold coating to eliminate the electrostatic charging effects. From the SEM observation, the fracture surfaces morphological feature of fibre-matrix interface and fracture mode were evaluated further.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124080957","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}

{"title":"Enhancement of Mechanical and Electrical Properties in Graphene Nanoplatelet Modified Nylon 66","authors":"M. I. Shueb, M. S. A. Manaf, C. Ratnam, N. Mohamad, Maha Mohamed","doi":"10.37934/mjcsm.1.1.110","DOIUrl":"https://doi.org/10.37934/mjcsm.1.1.110","url":null,"abstract":"Conventional thermoplastics used in electronic housings and structural members are vulnerable to electromagnetic interference (EMI). To improve the EMI shielding property in thermoplastics, conductive fillers must be incorporated. By using nano-sized conductive fillers such as graphene nanoplatelets (GNP), conductivity can be achieved without the setbacks in terms of cost, processability and mechanical properties. In this study, mechanical and electrical properties of nylon 66 added with a minimal amount of GNP are investigated. Nylon 66/GNP nanocomposites were prepared by dry mixing followed with melt compounding. Sonication was performed prior to the mixing process to reduce agglomeration of GNP. Addition of 0.3 wt% GNP significantly improved (+15.2%) the tensile strength of nylon 66. The increase at 0.3 wt% GNP is attributed to high aspect ratio and good interfacial stress transfer associated with well dispersed GNP. However, tensile strength showed a decrease when GNP amount was further increased to 0.5 and 1.0 wt%. The result is in agreement to the XRD result, in which well dispersion of GNP with no reassembly or re-aggregation of graphene layers in nylon 66 matrix is indicated at 0.3 wt%. The good dispersion level of GNP at 0.3 wt% enables the formation of an effective network for electron path transmittance, as demonstrated by the increase in electrical conductivity.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126046098","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}

{"title":"QFD Approach in Determining the Best Practices for Green Supply Chain Management in Composite Technology Manufacturing Industries","authors":"W. Mahmood, U.A.A. Azlan","doi":"10.37934/mjcsm.1.1.4556","DOIUrl":"https://doi.org/10.37934/mjcsm.1.1.4556","url":null,"abstract":"The purpose of this paper is to determine the best practice of green supply chain management in composite technology manufacturing industries through quality function deployment or so-called as QFD approach. Since introduced, the QFD approach had been deployed in varieties of applications but lack of discussion on the know-what issues in developing the green supply chain model. Four case studies were been performed to have a consensus decision on the green supply chain practices using pre-determined parameters in QFD model. The findings show that top management commitment is the most essential element to ensure the success of green supply chain practices. Besides, workers’ commitment and customer focus are significance to the establishment of 24 items or measures for green supply chain practices.","PeriodicalId":419270,"journal":{"name":"Malaysian Journal on Composites Science and Manufacturing","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127643553","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}