Longest chain of covalently-bonded atoms in a polymer
IUPAC definition
Main chain or Backbone That linear chain to which all other chains, long or short or both, may be regarded as being pendant.
Note: Where two or more chains could equally be considered to be the main chain, that one is selected which leads to the simplest representation of the molecule.[1]
In polymer science, the polymer chain or simply backbone of a polymer is the main chain of a polymer. Polymers are often classified according to the elements in the main chains. The character of the backbone, i.e. its flexibility, determines the properties of the polymer (such as the glass transition temperature). For example, in polysiloxanes (silicone), the backbone chain is very flexible, which results in a very low glass transition temperature of −123 °C (−189 °F; 150 K).[2] The polymers with rigid backbones are prone to crystallization (e.g. polythiophenes) in thin films and in solution. Crystallization in its turn affects the optical properties of the polymers, its optical band gap and electronic levels.[3]
^IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "main chain (backbone) of a polymer". doi:10.1351/goldbook.M03694
^"Polymers". Archived from the original on 2015-10-02. Retrieved 2015-09-17.
^Brabec, C.J.; Winder, C.; Scharber, M.C; Sarıçiftçi, S.N.; Hummelen, J.C.; Svensson, M.; Andersson, M.R. (2001). "Influence of disorder on the photoinduced excitations in phenyl substituted polythiophenes" (PDF). Journal of Chemical Physics. 115 (15): 7235. Bibcode:2001JChPh.115.7235B. doi:10.1063/1.1404984.
of the molecule. In polymer science, the polymer chain or simply backbone of a polymer is the main chain of a polymer. Polymers are often classified...
In polymer chemistry, an inorganic polymer is a polymer with a skeletal structure that does not include carbon atoms in the backbone. Polymers containing...
330 million tons of these polymers are made every year (2015). Most commonly, the continuously linked backbone of a polymer used for the preparation of...
termed a ‘’brush macromolecule’’. In polymer chemistry, graft polymers are segmented copolymers with a linear backbone of one composite and randomly distributed...
significant in vinyl polymers of the type -H 2C-CH(R)- where each repeating unit with a substituent R on one side of the polymerbackbone is followed by the...
is a polymer composed of repeat units of both electrically neutral repeating units and ionized units covalently bonded to the polymerbackbone as pendant...
In polymer chemistry, vinyl polymers are a group of polymers derived from substituted vinyl (H2C=CHR) monomers. Their backbone is an extended alkane chain...
temperature on this. Polymer devolatilization is similarly effected. At high temperatures, the components of the long chain backbone of the polymer can break (chain...
saturated polymers. Furthermore, placing different functional groups as substituents on the polymerbackbone leads to a twisted conformation of the polymer chain...
Electrostrictive graft polymers consist of flexible backbone chains with branching side chains. The side chains on neighboring backbonepolymers cross link and...
large numbers between 200 and 2500. When the repeating units in the polymerbackbone are six-carbon monosaccharides, as is often the case, the general formula...
is influenced by the degree of backbone unsaturation in the prepolymer; Epoxy functional resins can be homo-polymerized with anionic or cationic catalysts...
radicals along the polymerbackbone from an abstraction of a halogen, from either the backbone or a functional group along the backbone. Monomers are reacted...
Nylon is a family of synthetic polymers with amide backbones, usually linking aliphatic or semi-aromatic groups. Nylons are white or colorless and soft;...
Cardo polymers are a sub group of polymers where ring structures are pendent to the polymerbackbone. The backbone carbons bonded to the pendent ring structures...
by the same mechanism, twisting of the polymerbackbone and disrupting conjugation, making conjugated polymers attractive as sensors that can provide...
the type of modification. Polymers may be chemically modified to induce antimicrobial behavior or they may be used as a backbone for the addition of organic...
Park, oldest state park in Iowa, US Backbone chain, in polymer chemistry, the framework of the molecule Backbone network, the top level of a hierarchical...
side chains onto the polymer backbone may determine the colour of emitted light or the stability and solubility of the polymer for performance and ease of...
in particular based on a high percentage of aromatic carbons in the polymerbackbone which produces a certain stiffness. Approaches for an improvement...
easily break down.[citation needed] Polymers, specifically biodegradable polymers, have extremely strong carbon backbones that are difficult to break, such...
idea that, in the absence of specific, stabilizing interactions, a polymerbackbone will "sample" all possible conformations randomly. Many unbranched...
and "radical"). In polymer science, the side chain of an oligomeric or polymeric offshoot extends from the backbone chain of a polymer. Side chains have...
thermoplastic polymers. The polar ketone groups in the polymerbackbone of these materials gives rise to a strong attraction between polymer chains, which...
grammatical units within sentences Branching (polymer chemistry), the attachment of side chains to a polymer'sbackbone chain Branching (revision control), a...
PEG (polyethylene glycol) incorporated into, or pendant from, the polymerbackbone. Two component polyurethane dispersions are also available. There has...
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