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Jin SY, Du WW, Benkhenafou F, Douadji L. Investigation of the Mechanical and Thermal Properties of LFR PA66 with Graphene Coating on Fibre Surface. INT POLYM PROC 2018. [DOI: 10.3139/217.3604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
An industrial fibreglass winding process is employed to apply graphene based sizing (0.2 wt% graphene concentration) on fibreglass surface. Both SEM and Raman spectroscopy characterization have proved that the coating of graphene on fibreglass surface is homogeneous and that the roughness of the fibreglass surface was improved. Long fiberglass-graphene reinforced PA66 pellets are successfully prepared through a pultrusion process. LGF-graphene-PA66 composites are produced following an injection molding process. Thermal conductivity was found to increase from 0.23 W/m · K−1 to 0.67 W/m · K−1 when compared with samples without graphene coating. The tensile strength of LGF-graphene-PA66 is 196 MPa while that of LGF-PA66 is 173 MPa. Tensile modulus is also found to increase to 13.5 GPa from 10.6 GPa after graphene coating. This new graphene coating process is a good method to produce high performance composites.
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Affiliation(s)
- S.-Y. Jin
- Luojiang Jinhua Fibreglass , Deyang City, Sichuan Province , PRC
| | - W.-W. Du
- College of Material Science and Engineering , Southwest University, Chongqing , PRC
| | - F. Benkhenafou
- Department of Physical , University of Tlemcen, Tlemcen , Algeria
| | - L. Douadji
- Chongqing Institute of Green and Intelligent Technology , Chinese Academy of Sciences, Chongqing , PRC
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Wen S, Du WW, Douadji L. Study on the Influence of Extrusion Temperature and Extrusion Die on the Properties of Self-Reinforced PP Sheets. INT POLYM PROC 2017. [DOI: 10.3139/217.3366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The polypropylene (PP) samples were prepared at different molding temperature and their properties and structures were studied. The nearby melting point extrusion and molten extrusion were used to mold PP samples. The tensile strength of PP samples with molding nearby melting point extrusion had a 20.46% increase compared with samples with conventional extrusion. The same phenomenon occurred in Vicat softening temperature and there was a 13.9% increase. Differential scanning calorimetry (DSC) showed the degree of crystallinity for samples by nearby melting point extrusion increased 2.74% compared with samples by molten extrusion. The nearby melting point extrusion molding was beneficial to refine crystalline grain and the results can be proved in XRD, DSC and SEM tests.
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Affiliation(s)
- S. Wen
- Chongqing Academy of Science and Technology , Research Center for Advanced Materials, Chongqing , PRC
| | - W.-W. Du
- Southwest University , College of Material Science and Engineering, Chongqing , PRC
| | - L. Douadji
- Chongqing Institute of Green and Intelligent Technology , Chinese Academy of Sciences, Shuitu Town, Beibei District, Chongqing , PRC
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