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Synthesis and properties of graft copolymers based on poly(3-hydroxybutyrate) macromonomers

Sophie Nguyen1, Robert H Marchessault

  • 1Department of Chemistry, McGill University, 3420 University Street, Montreal, QC, H3A 2A7, Canada.

Macromolecular Bioscience
|October 7, 2004
PubMed

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Characteristics and Nomenclature of Copolymers

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Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
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Molecular Weight of Step-Growth Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...