Which of the following polymers soften on heating and harden on cooling? What are the polymers with this property collectively called? What are the st
Which of the following polymers soften on heating and harden on cooling? What are the polymers with this property collectively called? What are the structural similarities between such polymers? Bakelite, urea-formaldehyde resin, polythene, polyvinyls, polystyrene.
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