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Exercises
1. Which would be more flexible: （a） poly（methyl acrylate） or （b） poly（methyl meth-acrylate）? Why?
2. Show examples of polymers whose intermolecular forces are principally （a） London forces （b） dipole-dipole forces （c） hydrogen bonding.
3. What is the difference between the hydrogen bonds in fiber molecules and in globular protein molecules?
References
SEYMOUR R B，CARRAHER C E J. Polymer Chemistry-an Introduction [M]. 2nd ed. New York:Marcel Dekker，Inc.，1988.