Stretch blow moulding of PET; structure development and constitutive model
Source abstract
Abstract
Microstructure of PET in stretch blow moulding is studied combining controlled tension followed by quenching, free-blow and ISBM. Due to quenching, observed final microstructure is often closer to a mesophase than to crystal. Texture is, for its part, controlled by the loading path. In fact stretching only induces appearance of an oriented precursor-phase that will become a crystal during cooling steps providing that this latter is slow enough. Microstructure evolution does not obey the classical “nucleation –growth” schematic. This enlightens development of constitutive models demonstrating the irrelevance of the crystallinity ratio as parameter and of the Avrami-like approach as part of the model. One, model based on revisited network approach is suggested.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Polymer crystallization and properties · Injection Molding Process and Properties · Rheology and Fluid Dynamics Studies
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References (31)
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