Internal Stresses, Dimensional Instabilities and Molecular Orientations in PlasticsPresents the results of an investigation conducted at the former TNO Central Laboratory between 1968 and 1973, and also includes more recent data from the literature and the results of ground-breaking research. Increasing demands on precision injection molding, from more stringent requirements, with respect to dimensional and shape stability, to attempts to build Computer Aided Design programs that link processing conditions and product properties, have necessitated a book such as this. Topics discussed range from linear viscoelastic theory to the origin of cooling stresses, to the definition of orientation. |
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Contents
REFERENCES TO GENERAL INTRODUCTION | 4 |
POLYMERS | 12 |
DIMENSIONAL INSTABILITY DUE TO | 23 |
Copyright | |
19 other sections not shown
Common terms and phrases
according to Eq anisotropy annealing behaviour calculated Chapter CHMA clamp consider constant cooling stresses creep compliance decrease deformation conditions deformation temperature degree of orientation denotes dimensional instability effect equation factor Figure Fil/Fo frozen-in birefringence frozen-in entropic stresses frozen-in strain frozen-in twist function given in Fig glass temperature glass transition glassy polymer heat conductivity heat transfer coefficient heating increases internal stresses isothermal large frozen-in linear m²/N measured N/m² negative thermal expansion obtain original deformation parameter plot PMMA Poisson's ratio predicted PVC-Et-VA quenched ratio recovery relaxation residual stress rigid PVC rubber elasticity sample shear modulus shown in Fig shrinkage stress simple shear sin² specimen stress-relaxation stretching Struik surface T₁ Table temperature dependence temperature T1 thermal expansivity thermal shearing thermal straining thermal stresses thermal twisting torque unloading values viscoelastic theory Young's modulus zero Δη
References to this book
Structure Development During Polymer Processing António M. Cunha,Stoyko Fakirov No preview available - 2000 |