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Experimental investigations and optimization of processibility of sheet moulding compound
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Veröffentlicht/Copyright:
8. Juli 2011
Abstract
Sheet moulding compound (SMC) is a combination of glass fibers and filled polyester resin. It is processed by a compression moulding process and finds extensive applications in structural, automotive, electrical and electronic industries. The compression moulding process is characterized by the flow behavior of SMC under heat and pressure in the press mould. This paper is focused on the prediction of ideal processibility conditions of SMC. The qualitative aspect of a properly thickened (matured) moulding compound could be seen from its tack-free nature, which was quantitatively calibrated in terms of penetration depth, measured by a specially constructed softness indicator. The weight (wt)% of calcium carbonate (CaCO3) as filler, magnesium oxide (MgO) as thickener, graphite (C) and zinc stearate [Zn (C18H35O2)2] (ZnSt) as lubricants along with the maturation time (Tm) were selected as process variables. Taguchi’s scheme of experimental design was adapted to perform the experiments. It was found that the higher levels of MgO and CaCO3 were favorable for a good penetration depth as well as a reduced maturation time. We have also found that a penetration depth of at least 5 mm was required for achieving good processability conditions of SMC. An optimization study was under taken to find the right blend of additives and fillers, at their minimal weights and in the least possible maturation time, to achieve the desired processability. This study is particularly useful in a production run to make moulded parts from SMC.
Keywords: compression moulding; glass fibers; penetration depth; polyester; SMC statistical optimization; Taguchi method
Published Online: 2011-07-08
Published in Print: 2011-07-01
©2011 by Walter de Gruyter Berlin Boston
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Schlagwörter für diesen Artikel
compression moulding;
glass fibers;
penetration depth;
polyester;
SMC statistical optimization;
Taguchi method
Artikel in diesem Heft
- Original Articles
- Mechanical and microstructural properties of polystyrene based composites: positron lifetime spectroscopic and DSC studies
- Complex permittivity measurements of RF plasma polymerized polyterpenol organic thin films employing split post dielectric resonator
- Fluctuation-induced forces in critical crosslinked polymer blends
- Chemical and physical properties of self-crosslinked poly(vinyl chloride)/nitrile rubber nanocomposites prepared by melt-mixing process
- An effective tool to characterize adhesion at the interface of binary polymer blends: a free volume study
- Characterization of interfacial adhesion in binary polymer blends: a new approach based on positron lifetime study
- Microwave-assisted ionic liquid phase synthesis of phthalonitrile polymers
- Nano- and microcomplexes of biopolymer carrageenans and dodecylammonium chloride
- Performance enhancement of polysulfone ultrafiltration membrane by blending with polyurethane hydrophilic polymer
- Electrostrictive polymer composite for energy harvesters and actuators
- Dynamic mechanical behavior of phenoxy/carbon nanotube composites: assessment through different functionalization
- Thermodynamic analysis of phase separation of a thermoplastic in a variant epoxy/monoamine-diamine system: influence of epoxy molecular structure
- Synthesis and characterization of modified poly(methyl methacrylate)/Al2O3nanocomposites as denture resins
- A study on the potential of NCF thermoplastic composites for use in aeronautic structural applications
- Electromagnetic response of polymer composites with quasi-spherical nanocarbon inclusions: theory below the percolation threshold
- Processing and characterization of titanium dioxide composites from vegetable oil resource
- Thermo-mechanical properties and thermal conductivity of CdS-trans-polyisoprene, polymer nanocomposite
- Ultrasound assisted process of PA6/clay nanocomposites: mechanical, rheological and barrier properties
- A comparative study of polyelectrolyte induced metachromasy
- Synthesis, characterization and corrosion protection properties of polyN-(p-bromophenyl)-2-methacrylamide-co-glycidyl methacrylate on low nickel stainless steel
- Performance of high temperature superconducting ceramic/thermoplastic polymer composites
- Review
- Polythiophene composites: a review of selected applications
- Numerical and experimental studies on extrudate swell of branched polyethylene through axisymmetric and planar dies
- Applicability of time temperature superposition principle to an immiscible blend of polyphenyleneoxide and polyamide
- Study on the effect of processing conditions on the impact strength of PP/SEBS/PC ternary blends using Taguchi experimental analysis
- Role of important parameters in ring opening polymerization of polylactide
- Kinetic parameters estimation of ring-opening poly(lactic acid) polymerization by modeling and simulation
- Aromatic polyurethanes: the effect of hard segment and chain structure on their properties
- Development of integrated bioenergy devices for the improvement in the quality of life of poor people
- Mechanical and thermal properties of polymer micro- and nanocomposites
- Structural and electrical characterization of plasticized PVA: AgI polymer electrolyte
- Study of mechanical behavior of Kevlar/polypropylene hybrid yarns and their composites
- Water transport, FTIR, and morphology characterizations of novel biodegradable blends based on poly(3-hydroxybutyrate)
- Structural investigation of conducting polythiophene composites
- Microfluidic biochip injection moulded using a patterned SU-8/Si mould insert
- Modifications of polymers by additives and irradiations and their characterizations
- Experimental investigations and optimization of processibility of sheet moulding compound
