Correlation between process and silica dispersion/distribution into composite: Impact on mechanical properties and Weibull statistical analysis. (September 2018)

• Record Type: Journal Article
• Authors: Siot, Alexandra; Longuet, Claire; Léger, Romain; Otazaghine, Belkacem; Ienny, Patrick; Caro-Bretelle, Anne-Sophie; Azéma, Nathalie
• Is Part Of: Polymer testing. Volume 70(2018)
• Page Start: 92
• Page End: 101
• Publication Date: 2018-09
• Subjects: Process dispersion -- Mechanical properties -- Weibull theory -- Composite; Polymers -- Testing -- Periodicals; Polymères -- Tests -- Périodiques; 620.1920287
• DOI: 10.1016/j.polymertesting.2018.06.007
• Languages: English
• ISSNs: 0142-9418

Abstract

Abstract: The aim of this study is to propose a methodology for controlling and monitoring particle dispersion at each step of composite manufacturing. Composites with well and poor particle dispersion were manufactured and characterized by numerous methods to estimate the impact of different dispersion state on mechanical properties. An original Weibull statistical analysis is suggested and shows the impact of this dispersion state on ultimate stress. For this purpose, a "model" matrix of PMMA was chosen. Well-dispersed silica enhanced Young's modulus by ∼9% and ultimate stress by ∼6%, while poorly-dispersed silica does not affect Young's modulus and ultimate stress. Moreover, a size effect is observed for well-dispersed composites; and not with poor particles dispersion. Graphical abstract: Image 1 Highlights: Control and characterization of particles dispersion all along the elaboration process. Highlighting the contribution of a good vs. poor particles dispersion on mechanical properties. Weibull Theory: failure probability of composite as a function of inclusions dispersion and particle size.