Natural Polymers- Synthetic polymers- Chemical & Physical structure properties glass- transition temperature- Thermosets- Thermoplastics- characteristics & applications of polymers, Elastomers- Processing of plastic

1. Polymers
Natural Polymers-
Synthetic polymers-
Chemical & Physical structure
 properties glass-
transition temperature-
Thermosets-
Thermoplastics-
characteristics & applications of polymers, Elastomers-
Processing of plastic –assignment question

3. Natural polymers are large molecules made up of repeating units of smaller
molecules that occur naturally in living organisms. They are also known as
biopolymers and are found in a wide range of sources, including plants,
animals, and microorganisms. Some examples of natural polymers include
• Proteins: Proteins are a class of natural polymers that are composed of long
chains of amino acids. They are found in all living organisms and play a vital role
in many biological processes.
• Carbohydrates: Carbohydrates are another class of natural polymers that
include sugars and starches. They are an important source of energy for living
organisms.
• Cellulose: Cellulose is a natural polymer that is found in the cell walls of plants.
It provides structural support for the plant and is also used in the production of
paper and textiles.
• Chitin: Chitin is a natural polymer that is found in the exoskeletons of
arthropods and the cell walls of some fungi. It is a strong and flexible material
that provides support and protection.
• DNA and RNA: DNA and RNA are natural polymers that are involved in the
storage and transmission of genetic information in living organisms. They are
composed of long chains of nucleotides.
Natural polymers have a wide range of applications in fields such as medicine,
agriculture, and industry. They are often preferred over synthetic polymers
because they are biocompatible, biodegradable, and renewable.

6. There are many different types of natural polymers, each with unique properties and
applications. Here are some of the most common types
• Proteins: Proteins are complex natural polymers composed of long chains of amino acids.
They are found in many biological systems and have a wide range of functions, including
structural support, catalysis, and signaling. Examples of proteins include collagen, silk, and
keratin.
• Carbohydrates: Carbohydrates are natural polymers that are composed of simple sugars,
such as glucose, fructose, and galactose. They are an important source of energy and play a
role in cell signaling and structural support. Examples of carbohydrates include cellulose,
chitin, and starch.
• Nucleic acids: Nucleic acids are natural polymers that are involved in the storage and
transmission of genetic information. They are composed of nucleotides and come in two
forms: DNA (deoxyribonucleic acid) and RNA (ribonucleic acid).
• Lipids: Lipids are a diverse group of natural polymers that include fats, oils, and waxes. They
are important for energy storage, insulation, and cell membrane structure. Examples of
lipids include triglycerides, phospholipids, and cholesterol.
• Natural rubber: Natural rubber is a natural polymer that is derived from the sap of rubber
trees. It is elastic and has a wide range of applications, including in the production of tires,
adhesives, and medical devices.
• Silk: Silk is a natural polymer that is produced by silk worms. It is strong, lightweight, and
biocompatible, making it useful in a variety of applications such as textiles and medical
devices.
• Collagen: Collagen is a natural polymer that is found in connective tissues such as skin, bone,
and cartilage. It provides structural support and has applications in wound healing and tissue
engineering.
These are just a few examples of the many different types of natural polymers that exist. Each
has unique properties that make it useful in a variety of applications.

12. Chemical properties

15. Physical properties

24. Mechanical properties

38. Properties of glass
• 1. Transparency of Glass: Transparency is the main property of glass
which allows the vision of the outside world through it. The
transparency of glass can be from both sides or from one side only. In
one side transparency, glass behaves like a mirror from the other side.
• 2. Strength of Glass: The strength of glass depends on the modulus of
rupture value of glass. In general glass is a brittle material but by adding
admixtures and laminates we can make it as more strong.
• 3. Workability of Glass: A glass can be molded into any shape, or it can
be blown during melting. So, workability of glass is a superior property.
• 4. Transmittance: The visible fraction of light that passing through glass
is the property of visible transmittance.
• 5. U value of Glass: U value represents the amount of heat transferred
through glass. If a glass is said to be insulated unit then it should have
lower u value.
• 6. Recycle Property of Glass: Any glass can be 100% recyclable. It can
also be used as raw material in construction industry.