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Vergnes B. Influence of Processing Conditions on the Preparation of Clay-Based Nanocomposites by Twin-Screw Extrusion. INT POLYM PROC 2019. [DOI: 10.3139/217.3827] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AbstractThis review paper is devoted to the preparation of clay-based thermoplastic nanocomposites by melt blending in a twin-screw extruder. The influence of the main processing parameters (screw speed, feed rate, barrel temperature, screw profile) on the state of the clay dispersion at the micro- and nanoscale is characterized. The change of dispersion state along the screws and the corresponding mechanisms are presented. The interest of process modelling to predict the state of dispersion is evaluated and, finally, the main modifications of the twin-screw extrusion process to improve the clay dispersion are reviewed.
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Affiliation(s)
- B. Vergnes
- 1MINES Paris Tech, PSL Research University, CEMEF, UMR CNRS 7635, CS 10207, Sophia Antipolis, France
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Martínez-Colunga JG, Sánchez-Valdes S, Blanco-Cardenas A, Ramírez-Vargas E, Ramos-de Valle LF, Benavides-Cantu R, Espinoza-Martinez AB, Sanchez-Lopez S, Lozano-Ramirez T, Lafleur PG, Karami S. Dispersion and exfoliation of nanoclays in itaconic acid funcionalized LDPE by ultrasound treatment. J Appl Polym Sci 2018. [DOI: 10.1002/app.46260] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Saúl Sánchez-Valdes
- Centro de Investigación en Química Aplicada, Blvd Enrique Reyna 140; Saltillo Coahuila C.P 25294 México
| | - Armida Blanco-Cardenas
- Centro de Investigación en Química Aplicada, Blvd Enrique Reyna 140; Saltillo Coahuila C.P 25294 México
| | - Eduardo Ramírez-Vargas
- Centro de Investigación en Química Aplicada, Blvd Enrique Reyna 140; Saltillo Coahuila C.P 25294 México
| | | | - Roberto Benavides-Cantu
- Centro de Investigación en Química Aplicada, Blvd Enrique Reyna 140; Saltillo Coahuila C.P 25294 México
| | | | - Santiago Sanchez-Lopez
- Centro de Investigación en Química Aplicada, Blvd Enrique Reyna 140; Saltillo Coahuila C.P 25294 México
| | - Tomas Lozano-Ramirez
- Instituto Tecnológico de Cd. Madero; Juventino Rosas y Jesus Urueta; Cd. Madero Tamaulipas C.P 89440 México
| | - Pierre G. Lafleur
- Chemical Engineering Department; Ecole Polytechnique de Montreal, P.O. Box 6079, Stn. Centre-Ville; Montreal Quebec H3C 3A7 Canada
| | - Shahir Karami
- Chemical Engineering Department; Ecole Polytechnique de Montreal, P.O. Box 6079, Stn. Centre-Ville; Montreal Quebec H3C 3A7 Canada
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Carbon Fiber Composites of Pure Polypropylene and Maleated Polypropylene Blends Obtained from Injection and Compression Moulding. INT J POLYM SCI 2015. [DOI: 10.1155/2015/493206] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A comparative study of the mechanical performance of PP and PP/PP-g-MAH blends reinforced with carbon fibre (CF) obtained by two different moulding techniques is presented. Three filler contents were used for fabricating the composites: 1, 3, and 5 pph (parts per hundred). The crystallisation behaviour of the composites was studied by differential scanning calorimetry. Morphological and structural features of these samples were observed by atomic field microscopy and Fourier-transform infrared spectroscopy, respectively. Mechanical properties of the injection and compression moulded composites were evaluated by means of tensile and impact resistance tests. The fracture surface of the impacted samples was observed by scanning electron microscopy. The processing method had a noticeable effect on the results obtained in these tests. Young’s modulus was enhanced up to 147% when adding 5 pph CF to a PP matrix when processed by compression moulding. Addition of PP-g-MAH and CF had a favourable effect on the tensile and impact strength properties in most samples; these composites showed improved performance as the filler content was increased.
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