Thesis-1994-Hamdan.pdf (5.01 MB)
The thermomechanical properties of aromatic polymers
Version 2 2020-01-29, 09:50
Version 1 2013-09-23, 12:51
thesis
posted on 2020-01-29, 09:50 authored by Sinin bin HamdanHigh performance aromatic polymers such as PEEK and PEK are widely
used in composite and related applications. However, their high rate
thermomechanical properties are not well understood. This thesis
describes a series of investigations into their mechanical behaviour over
a large range of strain rates (10-3 -103 s-1
) and temperatures (20-200°
C) which were carried out in order to more fully understand their
properties and to assess the applicability of standard polymer property
models to their behaviour. The experiments involved the design and
construction of two novel sets of high rate test apparatus. These were a
cross-bow based system which enabled high strains to be obtained at
strain rates of 103 s-1 and a drop-weight system based around a high
speed camera which enabled direct measurements of radial strain and
observation of sample behaviour to take place. The cross-bow apparatus
incorporated a laser-photodiode system to enable direct strain
measurements to be made and thus had an advantage over
conventional Hopkinson bars of direct, rather than derived, strain
measurements with a sufficiently energetic projectile to produce large
deformations. These systems were used in addition to standard
hydraulic ram and dropweight equipment. A heater unit to enable tests to
be carried out over the desired temperature range was also designed
and constructed and used with all the above systems.
A comprehensive set of Differential Scanning Calorimetry and X-ray
tests were carried out on samples before and after mechanical testing in
order to provide structural data to aid the interpretation of the mechanical test results
History
School
- Science
Department
- Physics
Publisher
Loughborough UniversityRights holder
© Sinin bin HamdanPublication date
1994Notes
A Doctoral Thesis. Submitted in partial fulfillment of the requirements for the award of Doctor of Philosophy of Loughborough University.EThOS Persistent ID
uk.bl.ethos.262364Language
- en
Supervisor(s)
G.M. SwalloweQualification name
- PhD
Qualification level
- Doctoral