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Ethylene gas (H 2 C=CH 2) is the monomer for polyethylene.; Other modified ethylene derivatives include: tetrafluoroethylene (F 2 C=CF 2) which leads to Teflon; vinyl chloride (H 2 C=CHCl) which leads to PVC
The degree of polymerization, or DP, is the number of monomeric units in a macromolecule or polymer or oligomer molecule. [1] [2] [3]For a homopolymer, there is only one type of monomeric unit and the number-average degree of polymerization is given by ¯ ¯ = ¯, where ¯ is the number-average molecular weight and is the molecular weight of the monomer unit.
A polymer (/ ˈ p ɒ l ɪ m ər / [4] [5]) is a substance or material that consists of very large molecules, or macromolecules, that are constituted by many repeating subunits derived from one or more species of monomers. [6]
The image above contains clickable links This diagram (which is interactive) of protein structure uses PCNA as an example. (Protein structure is the three-dimensional arrangement of atoms in an amino acid-chain molecule.
Chemical structure of a polypeptide macromolecule. A macromolecule is a very large molecule important to biological processes, such as a protein or nucleic acid.It is composed of thousands of covalently bonded atoms.
Characterization, when used in materials science, refers to the broad and general process by which a material's structure and properties are probed and measured. It is a fundamental process in the field of materials science, without which no scientific understanding of engineering materials could be ascertained.
alternating copolymer: A copolymer consisting of macromolecule comprising two species of monomeric unit in alternating sequence. (See Gold Book entry for note.) [ 14 ] An alternating copolymer has regular alternating A and B units, and is often described by the formula: -A-B-A-B-A-B-A-B-A-B-, or -(-A-B-) n -.
In polymer chemistry, the term prepolymer or pre-polymer, refers to a monomer or system of monomers that have been reacted to an intermediate-molecular mass state. This material is capable of further polymerization by reactive groups to a fully cured, high-molecular-mass state.