Which of the following polymers have extensive covalent crosslinks between adjacent molecular chains?
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A.
Network polymers
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B.
Linear polymers
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C.
Thermoplastic polymers
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D.
Polyethylene
Correct Answer:
A. Network polymers
Explanation:
Network polymers are defined by a complex three-dimensional structure formed by extensive covalent crosslinks between adjacent molecular chains. These chemical bonds create a rigid, interconnected mesh that prevents the chains from sliding past one another, distinguishing them from linear or branched polymers. While linear and thermoplastic polymers like polyethylene consist of independent chains held by weaker secondary forces, the dense network of covalent bonds in network polymers results in high mechanical strength, thermal stability, and a resistance to melting or dissolving.
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