Electroactive polymers

interpenetrating polymer networks (IPN). An obvious requirement is that the two monomers must be fully compatible, and their polymers as well, in order to avoid segregation and the formation of heterophasic materials. The major advantages of these UV-curable hybrid systems lie in their superior combination of properties which can be tailor-made for a given application by adjusting the proportions of the two components. The IPN formed will exhibit the main features of the two polymer networks, for instance

factors and other bioactive molecules into a CP It is often desirable to modify the material properties of a polymer to better optimize it for different applications. Critical properties that affect the possible applications of the polymer include conductivity, porosity, hydrophobicity, degradability. There are four main processes to incorporate chemical and biological molecules into a polymer. The simplest method is adsorption, following the

SMART POLYMERS Polymer scientists have been trying hard to mimic this feature for the last twenty years creating called smart polymers. These are defined as polymers that go through reversible large, physical or chemical changes in response to small external changes in the environmental conditions, such as temperature, pH, light, magnetic or electric field, ionic factors, biological molecules, etc. Smart polymers have very promising applications in the biomedical field as delivery systems of therapeutic

free radical mechanism. The free radical is generated in a polymer chain by using high energy radiations. The free radical is formed by breaking C-H bond and formation of C-C bond amongst the monomers. Schematic of this can be represented as in fig.1 It is known that bond energy for cleavage of C-H bond is 364kJ/mol. The electron beam having energy sufficient to break C-H bond is suitable for cross linking. linking. Cross linking of polymers by radiation technology involve four main variables. 1. Type

Polymerization Polymerization is when two monomer molecules join together to form a larger polymer monomer molecule or a chain of lager polymer molecules. This chemical reaction takes place through dehydration synthesis. Dehydration synthesis is when water is removed to make it able for monomers to join of bond together. The four major group of biochemical: carbohydrates, nucleic acid, lipids, and proteins share properties with polymerization of the macromolecules. Therefore completed macromolecules

polyesteramide of different morphology with fairly high average molecular weight, glass transition temperature and degradation temperature. This polymer has unique characteristics due to different functional group such as ester, amide and aromatic groups present in the polymer matrix which further helps in enhancing thermal and mechanical properties. The obtained polymer was characterized by the different methods such as Fourier transformed infrared spectroscopy, X-ray scattering, differential scanning calorimeter

Effect of AA content on the swelling ratio of hydrogel Fig. 3b shows the effect of AA on the Q value of hydrogel. With increasing concentration of AA, the Q values of hydrogels increased and then decreased. When AA amount was more than 7 g, the Q values of hydrogels decreased because when the concentration of AA was high, the collision probability between monomers would increase, thus increasing the graft length of sulfonated cellulose, favoring the formation of a polymeric network at higher Q values

Water-soluble conjugated polymers (WCPs) have wide application prospects in biological imaging, diagnosis, and treatment areas. Currently, the synthetic methods of WCPs mainly include palladium-catalyzed coupling reactions (Suzuki, Heck, and Sonogashira), Wessling reaction, and FeCl3-catalyzed oxidative polymerization. All these methods follow the step-wise polymerization mechanism, which has disadvantages such as uncontrollable molecular weights, wide molecular weight distribution, difficult terminal

The evolution of polymers throughout the past has been very impressive. Many industries depend very heavily on polymers. A polymer is a long molecule consisting of many similar or identical building blocks linked by covalent bonds ( ). Polymer means many monomers. A monomer is a simple compound whose molecules can join together to form polymers ( ). Polymerization is the process of connecting these monomers together and creating large macromolecules of different sizes and shapes ( ). Advances

Union PMMA is routinely delivered by emulsion polymerization, arrangement polymerization, and mass polymerization. By and large, radical start is utilized (counting living polymerization strategies), yet anionic polymerization of PMMA can likewise be performed. To deliver 1 kg (2.2 lb) of PMMA, around 2 kg (4.4 lb) of petroleum is required. PMMA produced by radical polymerization (all business PMMA) is a tactic and totally nebulous. Handling The glass move temperature (Tg) of atactic PMMA is