ACRYLIC
(polymethyl methacrylate)
PRESENT BY
Thanakrit Thiengtham
5310755573
Nattapon Tangpipatpairee 5310755177
WHAT IS ACRYLIC ??
Acrylic is the common term for the synthetic
polymer, polymethyl methacrylate (PMMA).
Since it’s inception to the market, acrylic has
significantly increased in both use and benefit.
This transparent thermoplastic material is now
sold under various trade names including but
not limited to Plexiglass, Perspex, Acrylite,
Acrylplast, and Lucite.
polymethyl
methacrylate
PROPERTIES OF ACRYLIC
Physical Properties
Aesthetic
Acrylic fibers are attractive and have a soft, pleasant hand. Bulky
spun yarns are textured to be wool-like. Apparel and furnishing
items of all acrylic or acrylic blends are attractive. Their luster is
matte due to delustering, the irregular cross-sectional fiber shape,
and fiber crimp. Since these products are almost always staple
fibers, their wool-like appearance is maintained. Bulky yarns and
bicomponent fibers also contribute to the wool-like appearance.
DURABILITY
Acrylics are not as durable as nylon,
polyester, or olefin fibers. Dry tenacity is
moderate, ranging from 2.0 to 3.0 g/d (grams
per denier). The abrasion resistance is also
moderate. The elongation at break is 35
percent. Elongation increases when the fiber
is wet. The overall durability of acrylic fibers
is moderate, similar to that of wool and
cotton.
COMFORT
The fiber surface of acrylic fibers is much less regular than that of
other synthetic fibers. In spite of the relatively low moisture regain of
1.0 - 2.5 percent, acrylic are moderately comfortable because of the
irregular fiber surface. Instead of absorbing moisture and becoming
wet to the touch acrylic fibers wick moisture to the fabric's exterior
where it evaporates more readily and cools the body. Another factor
that makes acrylics comfortable is that the fibers and yarns can be
made with high bulk. The resulting bulky fabrics retain body heat well
so they are warm in cold temperatures.
APPEARANCE RETENTION
The dimensional stability of acrylic
fabric is good. Acrylic shrink when
exposed to boiling water, so high
temperatures and steam should be
avoided. The fibers have poor hotwet properties. Acrylic fibers cannot
heat set because it does not melt,
but decomposes and discolours
when heated.
CHEMICAL PROPERTIES
Weak alkalies do not affect
acrylics. Concentrated alkalies
degrade acrylics. Acrilan is the
most alkali-resistant of the acrylic
fibers. Cold, concentrated nitric
acid dissolves acrylic fibers, and
other concentrated acids weaken
them. Dilute acids do not harm
the fibers.
THERMAL PROPERTIES
The acrylic fibers decompose
before they melt, although a fiber
held close to a flame will shrink
away from it. Acrylic fibers burn
with a yellow flame. They form a
hot gummy residue that drips away
from the burning material. The
molten drip solidifies to a hard,
brittle black bead. The materials
are not self-extinguishing.
APPLICATION OF ACRYLIC
Public Aquarium Windows
Acrylic is the ideal material for
Aquarium Construction. Acrylic has
been used for many years in building
fish tanks, enabling Hydrosight to
acquire good knowledge and
experience in this sector. We offer
Cylinder Aquariums, shaped walls and
Acrylic Tunnels.
ACRYLIC SHIP WINDOWS
Our Ship windows can be used
near the water line or even
submerged. They are used for
observing marine life but also for
monitoring sea floor.
ACRYLIC SHIP WINDOWS
Hydrosight offers both custom cast
Submarine Windows certified by a
classification society of your choice
and plain windows cut to size
certified by German Lloyd.
REAR PROJECTION SCREENS
Semi-transparent displays, that are
illuminated by a projector from the
backside are oftenly made from
acrylic. This is especially the case for
large and very large displays. Even
spherical displays might be possible.
REFERRENCE
www.alinecomponents.com/acrylic.com
www.apparel/document/cate2/acrylicpr
operties.html