17 Questions
Which term describes the measure of how quickly polymer chains move relative to each other?
Melt viscosity
What type of branching involves polymer chains that are connected linearly with no side chains?
Linear
Which type of polymers are rarely used in their polymeric form in the lab-synthesized form?
Plastics
What is the term for the individual units that are linked together to form a polymer chain?
Monomers
Which term refers to the backbone of a polymer chain and can be classified as organic or inorganic?
Backbone chain
What type of polymers have more than one type of monomer unit in their chain?
Copolymer
What is the main purpose of stabilizers in plastic fabrication?
To prevent decomposition and discoloration at molding temperature
Which compound is commonly used as a white pigment in plastic fabrication?
Zinc Oxide
In compression molding, what type of plastics is the process applicable for?
Thermoplastics and thermosetting resins
What is the temperature range typically used in compression molding for thermoplastics?
100-200°C
What substance is added to plastic to prevent decomposition and discoloration at high molding temperatures?
Stabilizers
Which of the following compounds is used to impart a blue color to plastics?
Ultramarine
What is the main difference between Thermoplastics and Thermosetting plastics?
Thermoplastics can be softened on heating and remolded, while Thermosetting plastics cannot be reformed upon heating.
What is the role of plasticizers in plastics compounding?
Impart freedom of movement and flexibility by neutralizing intermolecular forces between molecules.
Which type of polymerization process do Thermoplastics typically undergo?
Addition polymerization
What is the purpose of fillers in plastic compounding?
To reduce shrinkage and cost, improve hardness and tensile strength.
Which of the following is NOT a common type of plasticizer?
Silicone
Learn about the basic concepts of polymers including their definition, properties, and classification. Explore the different types of polymers based on their origin and ultimate forces.
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