Structural Study of Natural and Synthetic Polymers
Wang, Jinfeng
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https://hdl.handle.net/2142/82759
Description
Title
Structural Study of Natural and Synthetic Polymers
Author(s)
Wang, Jinfeng
Issue Date
2004
Doctoral Committee Chair(s)
Geil, Phillip H.
Department of Study
Materials Science and Engineering
Discipline
Materials Science and Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Chemistry, Polymer
Language
eng
Abstract
In the second part, the molecular composition, size and conformation of zein, corn prolamines, was examined with MALDI-MS, TEM, SEC3, SAXS and viscometry. MALDI-MS is demonstrated to be a superior technique to study the molecular weight and composition of zein proteins than conventional SDS-PAGE. The observed large particle size from TEM and SEC3 compared to the predicted value from the molecular weight suggested that zein tends to form oligomeric structures. The denaturation behavior of zero was also studied using various denaturants. The results showed most denaturation agents, such as pH, guanidine hydrochloride and DTT, didn't denature zein. Temperature and SDS may cause some denaturation as suggested from the increase of the intrinsic viscosity; the change of intrinsic viscosity was not sufficient to indicate coil-like conformation.
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