Transcript Thermomechanical Analysis

Thermomechanical Analysis
Duncan Price
IPTME, Loughborough University
© Copyright: [email protected] (2006)
introduction
Volume is a fundamental thermodynamic
quantity.
Thermal expansivity () is a useful
engineering quantity:
 = (dL/dt)/Lo
Thermomechanical Analysis (TMA) is the
study of the relationships between a
sample’s length (volume) and its
temperature.
instrumentation
TMA probe types
TMA temperature calibration
thermal expansion of aluminium
printed circuit board
effect of load on TMA measurements
effect of cross linking on TMA penetration
effect of plasticisers
relationship between hardness and
indentation
isothermal creep measurements
measurement of liquids
effect of chemical structure
effect of thermal history
effect of orientation
sample controlled thermodilatometry
dynamic load TMA
summary
Intrinsic Properties
Process Properties
Product Classifications
Tg,  & probe displacement
cure & crosslinking
polymerisation
solvent effects
foaming
phase behaviour
flow modelling
crystallisation
drawing effects
viscosity
mold stability
carbonaceous materials
ceramics
coatings
construction materials
composites
dental waxes
elastomers
metals
pharmaceuticals
textiles
plastics
viscoelastic properties
 Young’s modulus
 creep
 stress relaxation
 tensile properties
 viscosity
polymers & copolymers
polymer blends
polymer morphology
recommended reading
M. Reading and P.J. Haines; “Thermomechanical, dynamic mechanical and associated
methods” in; P. J. Haines; “Thermal methods of analysis: Principles, Applications and
Problems” Blackie, London (1995) pp.123-160.
A. T. Riga and C. M. Neag (Editors); “Materials Characterization by Thermomechanical
Analysis”, ASTM STP 1136, American Society for Testing and Materials, Philadelphia
(1991).
D. M. Price, “Thermomechanical and Thermoelectrical Methods”, in P.J. Haines (ed.)
Principles of Thermal Analysis & Calorimetry, ch. 4, Royal Society of Chemistry,
Cambridge (2002) pp. 94-128.