Effects of hollow glass microsphere density and surface modification on the mechanical and thermal properties of poly(methyl methacrylate) syntactic foams

Date

2018-10-15

Author

ÖZKUTLU DEMİREL, MERVE
Dilek Hacıhabiboğlu, Çerağ
Bayram, Göknur

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

72
views

0
downloads

Syntactic foams offer low density polymers for insulation and transportation applications with the advantage of having high mechanical properties. In this study, poly(methyl methacrylate) (PMMA) syntactic foams were produced with three different types of hollow glass microspheres (HGMs) as low, medium and high density. It was observed that the density of the syntactic foams was in inverse ratio to the strength properties of the syntactic foams. The lowest measured syntactic foam density was obtained with the addition of high density HGMs into the PMMA matrix without compromising the mechanical properties. Surface coating of HGMs allowed increase in the flexural strength and the impact strength of PMMA syntactic foam by 12% and 17%, respectively, when they were compared with their counterparts with the uncoated HGMs. Addition of HGMs with modified surfaces into PMMA matrix reduced the composite density by 10% with respect to the neat PMMA while had no significant effect on its thermal characteristics.

Subject Keywords

Civil and Structural Engineering, Ceramics and Composites

URI

https://hdl.handle.net/11511/39359

Journal

COMPOSITE STRUCTURES

DOI

https://doi.org/10.1016/j.compstruct.2018.02.088

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

EFFECT OF POROSITY ON INTERFACIAL FAILURE IN STEEL-FIBER-REINFORCED POLYMER-IMPREGNATED CONCRETE Gündüz, Güngör (Elsevier BV, 1988-01-01) The interfacial bond between a steel fibre and concrete generally increases with the polymer content. Naphthalene used to generate new pores in order t increase the polymer loading and thus to increase the interfacial bond strength has a positive effect up to 3% by weight. Higher amounts weaken the cementitious phase and also decrease the amount of polymer incorporated. Drying of concrete before impregnation at 150°C rather than at 105°C increases the polymer loading and thus the interfacial bond strength. ...
Stress redistribution around fiber breaks in unidirectional steel fiber composites considering the nonlinear material behavior SABUNCUOĞLU, BARIŞ; Mutlu, Çağlar; Kadıoğlu, Fevzi Suat; Swolfs, Yentl (Elsevier BV, 2020-05-01) The use of steel fibers as reinforcement in polymer composites is recently increasing thanks to their ductility, high stiffness and wide range of diameters. Unlike carbon and glass fibers, steel fibers often end up with a non-circular cross-section due to their manufacturing technology. This may influence the stress redistribution around fiber breaks, which is important in longitudinal tensile failure of unidirectional composites. A parametric study was performed by using 3D finite element models with rando...
Effect of Presoaked Expanded Perlite Aggregate on the Dimensional Stability and Mechanical Properties of Engineered Cementitious Composites KESKİN, SÜLEYMAN BAHADIR; Sulaiman, Kamaran; Sahmaran, Mustafa; Yaman, İsmail Özgür (American Society of Civil Engineers (ASCE), 2013-06-01) This paper reports on an investigation of the use of expanded perlite aggregate as saturated lightweight aggregate (LWA) with respect to the mechanical and dimensional stability properties of engineered cemetitious composites (ECC). Expanded perlite aggregate was soaked in water for 24 h before its use in ECC, and replaced 10, 20, and 30% of the aggregate that was used in ECC production. The mixture proportion of a standard ECC mixture with properties that have been extensively reported in the literature is...
Design of fiber-reinforced composite pressure vessels under various loading conditions Levend, P; Katirci, N (Elsevier BV, 2002-10-01) An analytical procedure is developed to design and predict the behavior of fiber reinforced composite pressure vessels. The classical lamination theory and generalized plane strain model is used in the formulation of the elasticity problem. Internal pressure, axial force and body force due to rotation in addition to temperature and moisture variation throughout the body are considered. Some 3D failure theories are applied to obtain the optimum values for the winding angle, burst pressure, maximum axial forc...
Nanoclay assisted strengthening of the fiber/matrix interface in functionally filled polyamide 6 composites Isitman, Nihat Ali; AYKOL, Muratahan; Kaynak, Cevdet (Elsevier BV, 2010-08-01) This study describes the contribution of a nano-filler, i.e. an organically modified layered silicate, in respect of the fiber/matrix interfacial shear strength (IFSS) of a short glass fiber reinforced and functionally filled polyamide 6, given an exfoliated nanocomposite morphology. Apparent IFSS values are determined using a continuum micromechanical method. Polymer chains in the nanoconfined environment of an exfoliated clay nanocomposite are found to crystallize preferentially in the form of a specific ...

Citation Formats

M. ÖZKUTLU DEMİREL, Ç. Dilek Hacıhabiboğlu, and G. Bayram, “Effects of hollow glass microsphere density and surface modification on the mechanical and thermal properties of poly(methyl methacrylate) syntactic foams,” COMPOSITE STRUCTURES, pp. 545–550, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39359.