© Springer Nature India Private Limited 2020
A. K. Ghosh, M. Dwivedi, Processability of Polymeric Composites,
https://doi.org/10.1007/978-81-322-3933-8_4
79
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Rheology in Processing
of Polymeric Composites
4.1
Fundamentals of Rheology – 80
4.1.1
Viscometry – 81
4.1.2
Viscoelasticity – 86
4.2
Rheology Aspects of a Polymeric Matrix – 90
4.3
Rheology in Material Selection – 92
4.3.1
Rheology in Deciding Processing Conditions – 93
4.3.2
Rheology of Incorporation of Elastomer – 94
4.3.3
Rheology in the Dispersion of Fillers – 94
4.4
Flow Behaviour When Processing Composites – 95
4.4.1
Fibre Aspect Ratio – 96
4.4.2
Fibre Content – 96
4.4.3
Dependence of Processing on Rheology – 98
4.4.4
Change of Viscosity with Time and Temperature – 98
4.5
Rheology and Processability – 99
4.5.1
Optimization of Process Conditions – 99
4.5.2
Determination of Processing Window – 100
4.5.3
Fibre Dispersion and Orientation – 104
4.5.4
Troubleshooting – 105
4.6
Influence of Rheology on Composite Products – 107
4.6.1
Product Shrinkage – 108
4.6.2
Surface Properties – 109
4.6.3
Rheology in Structure–Property Correlation – 109
4.7
Rheological Measurement – 109
4.7.1
Viscoelastic Measurements – 109
4.7.2
Steady Shear Rheology – 111
4.7.3
Elastic Behaviour – 113
References – 115
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