18 Questions
What are the physical properties of woods related to moisture content?
Wood shrinks when it discharges water and dries, or swell when it absorbs water
What is a check in woods?
A lengthwise separation of the wood like small crack or split.
List three performance properties of woods.
Strength, Stiffness, Hardness
Define decay in the context of wood.
The rotting of wood
What is wane in wood?
Lack of wood on the face of the piece
Explain what warping is in relation to wood.
Any variation from a true or plane surface, including crack, bow, cup, twist, or any combination of these
What are the three types of classification based on the source of availability of polymers?
Natural, Synthetic, and Semi-synthetic Polymers
Give an example of a natural polymer.
Proteins, starch, cellulose, rubber
What is the most common and widely used synthetic polymer?
Plastic
Which category of polymers contains long and straight chains?
Linear Polymers
When linear chains of a polymer form branches, what category do they fall into?
Branched-chain Polymers
What type of monomers do cross-linked polymers contain?
Bifunctional and trifunctional monomers
What are polymers composed of?
Very large molecules called macromolecules that are multiples of simpler chemical units called monomers.
Give an example of a natural polymer found in living organisms.
Proteins.
What is the process by which polymers are created?
Polymerization.
What are copolymers made of?
Two or more different types of monomers.
What determines the type of polymerization mechanism used?
The type of functional groups attached to the reactants.
What is the basis of man-made materials like concrete and plastics?
Polymers.
Learn about the physical properties of woods, including how wood shrinks and swells based on moisture content and origin. Explore the performance properties of woods, which are dependent on various characteristics.
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