molecular weight

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molecular weight

n.
The sum of the atomic weights of all the atoms in a molecule. Also called relative molecular mass.

molecular weight

n
(Chemistry) the former name for relative molecular mass

molec′ular weight′


n.
the average weight of a molecule of an element or compound measured in units based on 1/12 the weight of the carbon-12 atom; the sum of the atomic weights of all the atoms in a molecule. Abbr.: mol. wt.
[1875–80]

molecular weight

The sum of the atomic weights of the atoms contained in a molecule. For example, since the atomic weight of hydrogen is 1 and the atomic weight of oxygen is 16, the molecular weight of water (H2O) is 1 + 1 + 16, or 18.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.molecular weight - (chemistry) the sum of the relative atomic masses of the constituent atoms of a moleculemolecular weight - (chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule
mass - the property of a body that causes it to have weight in a gravitational field
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
Translations
References in periodicals archive ?
w] is the weight-average molecular weight, and k is a constant that is specific to the polymer being evaluated.
Let us now digress for a moment and try to anticipate the corresponding number- and weight-average molecular weight trends.
developed a helical chiral polymer such as polylactic acid with a weight-average molecular weight of 50,000-1,000,000, optical activity, and 20-80% crystallinity, showing enhanced piezoelectricity.
In the suspension polymerization step, BPO (Vetec Quimica Fina, minimum purity of 97 wt%) was used as the oil-soluble initiator and PVA (Vetec Quimica Fina, minimum purity of 98 wt%, degree of hydrolysis of 88%, and weight-average molecular weight of 78,000 g/gmol) was used as the suspending agent.
000, and (a2) a melamine resin; and the organic solvent-based second colored coating composition (B) is a coating composition containing (b1) an acrylic resin containing a hydroxyl group, which has a hydroxyl group value in a range of 40-200 mgKOH/g and has a weight-average molecular weight in a range of 3,000-15,000, (b2) a melamine resin having a content rate of a mononuclear melamine of 40 mass % and (b3) an acid catalyst.
8,597,621 B2; L'Oreal has patented an emulsion lipstick composition, in solid form, comprising water; a water-insoluble half acid and half amide crosslinked reaction product of at least one oil-soluble high carbon polar modified polymer comprising at least one C22-C40 monomer and modified with at least one hydrophilic unit, and having a weight-average molecular weight of less than or equal to 30000 girnol and a crystallinity of 8-60% and at least one polyarnine, wherein the reaction product forms a matrix capable of entrapping water; at least one non-volatile solvent capable of solubilizing the oil-soluble high carbon polar modified polymer; and at least on high melting point wax.
The PLA resin has a weight-average molecular weight of 500,000-1,500,000 and an intrinsic viscosity of at least 1.
The maximum weight-average molecular weight of PLGA obtained in present work is 19,500 g/mol with the molar ratio of BuOH/Sn[(Oct).
The polar modified polymer is an oil-soluble polar modified polymer comprising at least one C2-C4 monomer and modified with at least one hydrophilic unit, and having a weight-average molecular weight of less than or equal to 25,000 g/mol and a melting point above 75[degrees]C.