CHEG 380 Introduction to Polymer Science and Engineering

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CHEG 380 Introduction to Polymer Science and Engineering
I. POLYMER PRODUCT
A polymer is a natural or synthetic
substance comprising a repeating chain of
molecules. Examples of polymer products
are polyethylene bags. We use these bags to
carry commodities from shopping places to
our homes, and as garbage packers, among
other applications.
II. PROPERTIES FOR
POLYETHYLENE BAGS
Polymer products have unique
properties that enable their practical use.
Polyethylene bags, for instance, have
suitable mechanical properties. The bags
have a low density yet high strength-to-
weight ratio. These bags carry different
weights, from light to heavy objects. The
low density reflects the lightweight, and the
high strength-to-weight ratio enables small
polyethylene bags to carry the weight that
light material other than polymer cannot.
Moreover, the nylon bags have abrasion and
chemical resistance. They cannot wear and
tear easily and are resistant to corrosion and
chemicals [1]. This resistance enables
polyethylene bags to carry various types of
material without fear of wear, tear, and
corrosion. Products like kerosene and hot
foodstuffs get transported without affecting
the carrying bag. Lastly, the polymers from
which polyethylene bag is made are self-
lubricating [1]. The lubricants control the
friction and wear, therefore enabling the
bags to carry items with ease.
III. POLYMER COMPOSITES FOR
POLYETHYLENE
The polymer composites suitable to
make polyethylene are such a mixture of
similar products of ethylene as low-density
polyethylene (LDPE), high-density
polyethylene (HDPE), polypropylene, and
polystyrene. Additive composites such as
hydrocarbons, fiber, titanium III chloride,
and graphite oxide help to improve the
mechanical properties of polyethylene,. Low
density polyethylene is tough, semi-rigid,
good chemical resistance, weatherproof, and
translucent. All these properties and the low
water absorption rates make LDPE suitable
to make polyethylene. Moreover, LDPE has