It is the linear polymeric chain of o– and p– hydroxy methyl phenol which when undergoes cross-linkages to form infusible solid polymer called bakelite.
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112.
What type of molecules act as initiators in cationic addition polymerization?
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113.
Give the uses of low density and high density polymers.
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114.
What are natural and synthetic polymers? Give two examples of each type.
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115.
Distinguish between the terms homopolymer and copolymer and give an example of each.
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116.
In which classes the polymers are classified on the basis of molecular forces?
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117.
How can you differentiate between addition and condensation polymerization?
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118.
Explain the term co-polymerization and give two examples.
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119.
Write the free radical mechanism for the polymerization of ethene.
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120.
Define thermoplastics and thermosetting polymers with two examples of each.
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