90 research outputs found
Kinetics of the Polymorphic Transition in Isotactic Poly(1-butene) under Uniaxial Extension. New Insights From Designed Mechanical histories.
Full text linkAnalisi micromeccanica di un modello elementare di materiale composito conparticelle eterogenee
No full textCrazing within glassy occlusions in rubber particles of toughened glassy polymers: a micromechanical investigation
No full textCharacterization of the viscoelastic behavior of stereoregular poly(isoprenes) by relaxation experiments
No full textMicromechanical analysis of a model of particulate composite materials with composite particles. Survey of craze initiation criteria
No full text
A topological and geometrical outline for description and design of polymeric macromolecules with structure regularity
No full textEnd unit effect on the Tg of differentiated series of perfluoro-poly-(oxymethylene-co-oxyethylene) oligomers
No full textCharacterization of the thermomechanical behaviour of polymers: non-isothermal creep deflection processes
No full textA non-isothermal creep process of a thermorheologically simple polymer is considered. For such a material, if the results of isothermal creep experiments are known, the creep compliance can be calculated as a function of time for any given thermal history by a suitable method. The results of creep deflection measurements on a sample of commercial polystyrene are reported. The data isothermally obtained at different temperatures are determined so as to obtain the master curve of the compliance as a function of time and the shift factor as a function of temperature. As an example, the above method is applied to predict the course of a laboratory test which is commonly used to determine the heat deflection temperature of thermoplastic polymers. The experimental results agree satisfactorily with the predicted value
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