Title page for ETD etd-11292001-141959


Type of Document Dissertation
Author Martin, Julie Patricia
URN etd-11292001-141959
Title An Investigation of the Microstructure and Properties of a Cryogenically Mechanically Alloyed Polycarbonate- Poly(ether ether ketone) System
Degree PhD
Department Materials Science and Engineering
Advisory Committee
Advisor Name Title
Kander, Ronald G. Committee Chair
Aning, Alexander O. Committee Member
Kampe, Stephen L. Committee Member
Love, Brian J. Committee Member
Ward, Thomas C. Committee Member
Keywords
  • Polycarbonate
  • Poly(ether ether ketone)
  • PEEK
  • PC
  • Mechanical alloying
Date of Defense 2001-11-14
Availability unrestricted
Abstract
This work investigates processing-microstructure-property relationships of a model cryogenically mechanically alloyed polymer-polymer system: polycarbonate (PC) and poly (ether ether ketone) (PEEK). Mechanically milled and alloyed powders were characterized using a variety of techniques including microscopy and thermal analysis. Cryogenically mechanically alloyed powders processed for 10 hours were shown to have a sub-micron level two-phase microstructure. These powders were processed into testable coupons using a mini ram-injection molder; microstructure and bulk mechanical properties of the coupons were investigated as a function of mechanical alloying and injection molding parameters. Atomic force microscopy, transmission electron microscopy, and scanning transmission X-ray microscopy revealed that the intimate blending achieved during the mechanical alloying process is not retained upon post-processing using a conventional polymer processing technique. Injection molded coupons were tested in 3-point bend mode via dynamic mechanical and quasi-static mechanical testing. Results demonstrated that no improvement in energy to break, strain at failure, or failure strength was achieved in coupons made from cryogenically mechanically alloyed powders compared to those of coupons made from non-mechanically alloyed samples.
Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  JPM_Dissertation.pdf 8.38 Mb 00:38:48 00:19:57 00:17:27 00:08:43 00:00:44

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.