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(c) Hydrogen bond is an example of secondary bonding in polymeric materials. Discuss what are hydrogen bond and the requirement for the bond to occur.

(c) Hydrogen bond is an example of secondary bonding in polymeric materials. Discuss what are hydrogen bond and the requirement for the bond to occur. Does hydrogen bonding occur between polyethylene terephthalate (PET) molecules? Justify your answer. Figure 1: Structure of polyethylene terephthalate

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