SHAPE MEMORY POLYMERS
temperature sensitive-responsive polymers, self-healing materials
Brown's Chemistry Revision Notes - Smart Materials and Materials Science
GCSE Chemistry Revision
Index of smart materials pages
Index of nanochemistry revision notes
general survey of materials - natural & synthetic, properties & uses
mobile phone or ipad etc. in 'landscape' mode
This is a BIG
website, you need to take time to explore it [SEARCH
list of keywords mentioned on these 'smart materials' pages:
Carbon fibres * Chromogenic
materials * Electrochromic materials
* Gore-Tex * Halochromic materials * High
performance polymers * Kevlar * Lycra *
Magnetic shape memory alloys * Magnetostrictive
materials * Nitinol *
pH sensitive polymers *
Photochromic materials *
Photomechancal materials * Piezoelectric
effect materials *
Self-healing materials * Shape
memory alloys *
Shape memory polymers * Spandex
* Temperature responsive polymers
* Thermochromic materials *
PART 3 SHAPE
MEMORY POLYMERS (plastics), pH and temperature
These are organic (usually)
polymer materials in which deformation (change in shape) can be induced and
recovered through temperature changes or stress changes.
Shape memory polymers (SMPs) are
another example of scientists trying to design 'intelligent' and
'self-repairing' materials e.g. like the development of high performance
polymers and shape memory alloys.
Thermally induced shape
memory materials (like shape memory alloys, SMA) are easy to manufacture
but cheaper than SMAs.
They are used in minimal
invasive surgery procedures.
This can be achieved with
stimuli sensitive implant materials.
Degradable implants could be
inserted into the body in a compressed (temporary) shape, through a small
incision, where they obtain the desired final relevant shape for the
particular situation after warming up to body temperature i.e. the SMP
device has a transition temperature above room temperature (operating
theatre temperature) but below the body temperature of 37oC e.g.
SMPs have applications in high
components in technical devices.
pH-sensitive polymers are
materials which can swell (by absorbing water?) when the pH of the surrounding aqueous
(water based) media changes.
The effect is reversible with change in pH
in the opposite direction to contract or collapse the material
(i.e. loses water?).
INDEX of SMART MATERIALS PAGES
CHROMOGENIC MATERIALS - Thermochromic, Photochromic & Electrochromic Materials
SHAPE MEMORY ALLOYS e.g. Nitinol & Magnetic Shape Memory Alloys
SHAPE MEMORY POLYMERS, pH and temperature sensitive-responsive polymers,
performance polymers like KEVLAR
GORETEX, THINSULATE and TEFLON-PTFE
PIEZOELECTRIC EFFECT (PIEZOELECTRIC MATERIALS) and PHOTOMECHANICAL MATERIALS
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