Whatarepolymers（macromolecules）?——substancescontainingalargenumberofstructuralunits(“mers”)joinedbythesametypeoflinkage.→chain-likestructureOr:verylargemoleculesmadeupofsmallerunits,calledmonomersorrepea
Donald M.Mattox, inHandbook of Physical Vapor Deposition (PVD) Processing (Second Edition), 2010 2.2.3Polymers A polymer is a large molecule formed by bonding numerous small molecular units, called monomers, together. The most commonpolymersare the organic polymers, which are based on carbon–hyd...
Polymers are a broad class of materials which are made from repeating units of smaller molecule called monomers. Polymers can be natural in origin such as the lignin of tree branches. Other polymers are termed synthetic, because they are made by humans from naturally-occurring materials. Example ...
Dendrons and dendrimers, having a well-controlled size and shape, are usually prepared by multi-step reactions with tedious isolation and purification procedures. On the other hand, hyperbranched polymers are prepared by a one-step self-polymerization of ABx type multi-functional monomers. In 1952,...
Conclusion:- Addition polymers are called chain growth polymers due to their continuous chain-like formation, while condensation polymers are termed step growth polymers because they form through a series of discrete steps involving the reaction of monomers. Show More ...
mutual solubility of a polymer and a solvent, the Gibbs free energy of mixing (DGmix) is considered that is expressed by the following relation: DGmix¼DHmix À TDSmix ð1Þ where DHmix and DSmix are the enthalpy and entropy of mixing, respectively, and T is the absolute ...
SEQUENCE IN POLYMER SCIENCE Peptides, which are representative polymers in nature, can be called copolymers that consist of a variety of amino acid units. Surprisingly, although as many as 20 kinds of amino acids have been used as commoners, the addition order for the propagation is perfectly ...
The formation of a new generation of hybrid bio-nanocomposites is reported: these are intended at modulating the mechanical, thermal and biocompatibility properties of the poly(vinyl alcohol) (PVA) by the combination of cellulose nanocrystals (CNC) and poly (d,l-lactide-co-glycolide) (PLGA) nano...
If the interfacial bonding is stronger than cohesive of the weaker material, then this material is fractured and the polymer transfer takes place. Otherwise fracture occurs at the interface. As a rule, in polymers the surface forces and forces acting between polymer chains are nearly equal and fr...
Large biological molecules are called macromolecules. Most biological macromolecules are polymers of unit called monomers. There is one biological macromolecule that does not have monomers as such.Answer and Explanation: There are four classes of biological macromolecules: nucle...