IMP_LEC_FINAL EXAMINATION_PART 1

is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants. It is an organic material – a natural composite of cellulose fibers that are strong in tension and embedded in a matrix of lignin that resists compression.

• Plastics

• Wood

• Rubber

• Metal

Plastic is made from __________?

• Grass

• Sand

• Fossil Fuel

• Raw Plastic

is a polymeric material that has the capability of being molded or shaped, usually by the application of heat and pressure.

• Paper

• Ceramic

• Rubber

• Plastic

Poly means ____ from the Greek word?

• Parts

• Many

• Units

• Small

is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. There are many forms of polymerization and different systems exist to categorize them.

• Evaporation

• Saturatation

• Condensation

• Polymerization

is any plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. Most thermoplastics have a high molecular weight.

• Thermostat

• Thermoplastic

• Thermosets

• Thermal

A material of uniform composition throughout that cannot be mechanically separated into different materials.

• Thermal Plastic

• Thermostat Plastic

• Heterogeneous Plastic

• Homogeneous Plastic

is a polymer with viscoelasticity and with weak intermolecular forces, generally low Young's modulus and high failure strain compared with other materials.

• Rigid Plastics

• Soft Plastics

• Elastomers

• Semi-Rigid Plastics

These are the additives of plastics, except one?

• Plasticizers

• Fillers

• Catalyst

• Randomizer

is a manufacturing process where a measured amount of molding material that's generally preheated (typically referred to as a charge) is compressed into the desired form using two heated molds.

• Blow Molding

• Transfer Molding

• Compression Molding

• Thermo Forming