Polymer and Star-shaped polymer

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Difference between Polymer and Star-shaped polymer

Polymer vs. Star-shaped polymer

A polymer (Greek poly-, "many" + -mer, "part") is a large molecule, or macromolecule, composed of many repeated subunits. Star-shaped polymers are the simplest class of branched polymers with a general structure consisting of several (more than three) linear chains connected to a central core.

Atom

An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.

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Branching (polymer chemistry)

In polymer chemistry, branching occurs by the replacement of a substituent, e.g., a hydrogen atom, on a monomer subunit, by another covalently bonded chain of that polymer; or, in the case of a graft copolymer, by a chain of another type.

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Catalysis

Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalysthttp://goldbook.iupac.org/C00876.html, which is not consumed in the catalyzed reaction and can continue to act repeatedly.

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Chlorine

Chlorine is a chemical element with symbol Cl and atomic number 17.

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Copolymer

When two or more different monomers unite together to polymerize, the product is called a copolymer and the process is called copolymerization.

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Crystallization of polymers

Crystallization of polymers is a process associated with partial alignment of their molecular chains.

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Dispersity

A monodisperse, or uniform, polymer is composed of molecules of the same mass.

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Dynamic mechanical analysis

Dynamic mechanical analysis (abbreviated DMA, also known as dynamic mechanical spectroscopy) is a technique used to study and characterize materials.

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Gel

A gel is a solid jelly-like material that can have properties ranging from soft and weak to hard and tough.

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Living polymerization

In polymer chemistry, living polymerization is a form of chain growth polymerization where the ability of a growing polymer chain to terminate has been removed.

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Macromolecule

A macromolecule is a very large molecule, such as protein, commonly created by the polymerization of smaller subunits (monomers).

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Melting point

The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid at atmospheric pressure.

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Molecular mass

Relative Molecular mass or molecular weight is the mass of a molecule.

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Molecule

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

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Paul Flory

Paul John Flory (June 19, 1910 – September 9, 1985) was an American chemist and Nobel laureate who was known for his work in the field of polymers, or macromolecules.

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Radius of gyration

Radius of gyration or gyradius of a body about an axis of rotation is defined as the radial distance of a point from the axis of rotation at which, if whole mass of the body is assumed to be concentrated, its moment of inertia about the given axis would be the same as with its actual distribution of mass.

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Rheology

Rheology (from Greek ῥέω rhéō, "flow" and -λoγία, -logia, "study of") is the study of the flow of matter, primarily in a liquid state, but also as "soft solids" or solids under conditions in which they respond with plastic flow rather than deforming elastically in response to an applied force.

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Sol–gel process

In materials science, the sol–gel process is a method for producing solid materials from small molecules.

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Viscosity

The viscosity of a fluid is the measure of its resistance to gradual deformation by shear stress or tensile stress.

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