7-Polymers

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Explain how the degree of polymerization affects the physical properties of a polymer ?
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Why are thermosetting polymers harder and more brittle than thermoplastics ?
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Why does natural rubber need vulcanization? What changes occur in its structure during this process ?
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Why are condensation polymers generally stronger than addition polymers ?
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Why do some polymers exhibit crystalline behavior while others are completely amorphous ?
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Why can polyethylene be both low-density (LDPE) and high-density (HDPE) even though both are made from the same monomer ?
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Compare the structure and uses of nylon-6 and nylon-6,6 ?
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Why is Bakelite used in electrical switches but not in packaging materials ?
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What will happen if a cross-linking agent is added in large quantities to a polymerization reaction ?
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Explain the role of initiators in the free-radical polymerization of ethene ?
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Why are silicones water-repellent and thermally stable ?
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Write the mechanism for the formation of Teflon from tetrafluoroethylene ?
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Explain the step-growth polymerization mechanism of PET (polyethylene terephthalate) ?
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Distinguish between chain-growth and step-growth polymerization with examples. ?
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Why are anionic polymerizations more sensitive to impurities than cationic polymerizations ?
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Explain why PVC softens on heating, but Bakelite does not ?
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How to solve this
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Which one of the following is classified as a homopolymer?
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Explain polymer and its types ?
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Match Lis-I with List-II. List-1 List-II A. Weak intermolecular forces of attraction I. Hexamethylenediamine + adipic acid.....
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