Flow Induced Crystallization of Poly(ether-block-amide) from the Microinjection Molding Process and its Effect on Mechanical Properties

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Title: Flow Induced Crystallization of Poly(ether-block-amide) from the Microinjection Molding Process and its Effect on Mechanical Properties
Authors: Zhang, Nan
Choi, Seong Ying
Gilchrist, M. D.
Permanent link: http://hdl.handle.net/10197/5942
Date: Nov-2014
Abstract: Crystallization during microinjection molding is investigated relative to process conditions. Modulus and hardness of the skin layer are higher than the core layer, regardless of core structure. Young's modulus, strain at break and yield stress all increase with an increase of skin ratio. The relationship between process, morphology and mechanical properties is studied for micro products. By using in-line process monitoring, flow induced crystallization is characterized by shear stress and apparent specific work. Shear stress is shown to be a good candidate to characterize the formation of highly oriented structures under actual microinjection molding processes. This may provide a method for in-line control of morphology development, and then final properties, by controlling the flow conditions.
Type of material: Journal Article
Publisher: Wiley Blackwell (John Wiley & Sons)
Copyright (published version): 2014 Wiley Blackwell (John Wiley & Sons)
Keywords: Critical shear stress;Shear induced crystallization;Short-term shear protocol;Specific work;Spherulite-free core structure
DOI: 10.1002/mame.201300459
Language: en
Status of Item: Peer reviewed
Appears in Collections:Mechanical & Materials Engineering Research Collection

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