Mechanisms in Bicomponent Fiber Spinning During Melt Blown Process

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Title: Mechanisms in Bicomponent Fiber Spinning During Melt Blown Process
Author: Zapletalova, Terezie
Advisors: Dr. Saad Khan, Committee Member
Dr. Stephen Michielsen, Committee Member
Dr. Eunkyoung Shim, Committee Member
Dr. Jan Genzer, Committee Co-Chair
Dr. Behnam Pourdeyhimi, Committee Chair
Abstract: ZAPLETALOVA, TEREZIE. Mechanisms in Bicomponent Fiber Spinning During Melt Blown Process (Under the direction of Dr. Behnam Pourdeyhimi and Dr. Jan Genzer) A series of melt blown bicomponent webs made with various grades of polypropylene and polyethylene were evaluated in terms of influence of process and polymer properties on fiber morphology and web mechanical properties. This study utilized full quadratic model with continuous factors of temperature and component ratio. We were able to obtain the effects these parameters on fiber and substrate properties with high statistical significance. Overall fiber crystallinity content as well as crystallinity content of each separate component can be well explained linked with a high degree of confidence to the processing temperature, component ratio, and several polymer component properties, including, enthalpy of melting, zero shear viscosity, activation energy of flow, and highest crystallization rate temperature. Fabric mechanical properties can also be correlated with the same structural parameters. Bicomponent fiber diameter could not be satisfactorily explained in terms of the same parameters, which indicates that there is another mechanism not described by the studied process and polymer data that largely influences substrate fiber diameter.
Date: 2009-02-23
Degree: PhD
Discipline: Fiber and Polymer Science
URI: http://www.lib.ncsu.edu/resolver/1840.16/5935


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