PPT-POLYMERIZATION REACTIONS

Polymerization can proceed according to two different mechanisms referred to as chaingrowth and stepgrowth polymerization S tep growth polymerization Stepgrowth polymers also called condensation . Rob Phillips. Applied Physics and Bioengineering. California Institute of Technology. Cells Decide: Where to Go. (Berman et al.). The Hunters of the Immune Response. There is another kind of rapid response to environmental cues that is much faster than gene regulation.. Plastics, Fibers and Foods. Polymerization. The formation of very large molecules from a number of smaller, REPEATING hydrocarbon molecules. Smaller MONOMERS are chained together by addition reactions or condensation. AND . POLYMERIZATION. By. Dr Rashid Hassan. Assistant Professor. RIHS. ISLAMABAD. 1. POLYMER. Poly = Many mer = Units. I.e. a material made up of many units.. Properly defined as:. Chemical compound composed of large organic molecules formed by the union of many repeating small monomer units.. . Polymers. are large molecules made up of repeating units called . Monomers. The synthetic process is. Polymerization.. E.g. . Note – define repeating unit in terms of monomer structure. Degree of Polymerization. N. -alkyl . N. -Carboxyanhydride: Mechanism, Kinetics and Architecture Elucidation. . Ang Li. . Zwitterionic ring-opening . polymerization of Bu-NCAs . has been investigated using . DBU, . a bicyclic amidine initiator. It was found that poly (. . Polymers. are large molecules made up of repeating units called . Monomers. The synthetic process is. Polymerization.. E.g. . Note – define repeating unit in terms of monomer structure. Degree of Polymerization. Alkenes. The commercial . process. of . hydrogenation is . used. to . convert the double . bonds. in . vegetable oils to . saturated. fats . such as those in margarine. . Learning . Goal . . Draw the condensed or line-angle structural formulas and give the names for the organic products of addition reactions of alkenes. Draw a condensed structural formula for a section of a polymer.. at WSU for . their continuous . hard work. . . We also acknowledge the National . Science Foundation, CCLI Grant #0126470 (JEOL NMR. ).. Abstract. . Various trialkyl phosphites (P(OR). 3. ) have been shown to start cationic polymerizations of cyclohexene oxide (CHO) through a radical chain mechanism with a diaryliodonium salt (Ar. 38, 39, 127, 128, 174, 175, 128, 137, 174, 175, 174, 175, n-Bu4NClO4, n-Bu4NBF4, and n-Bu.NI. The polymerization was carried out using iodine as a catalyst at 0 structural isomerism is used when polymers have the same overall chemical composition (i.e., same molecular formula) but differ in . the . order in which the atoms are connected to each other. . Polyacetaldehyde. year. . Lecture. 2. L. Roubalíková. Composite. . materials. Chemically bonded mixture of . organic. matrix . and inorganic . fille. r. s . . Coupling. agent – . binds. . organic. matrix and . M.P. KESAVAN M.Sc., Ph.D.,. Assistant Professor. Department of Chemistry. HKRH College. Uthamapalayam. .. 1. Polymers ???. 2. Polymers . may be naturally found in plants and animals (natural polymers) or may be man-made (synthetic polymers).. In step-growth polymerization, the polymers are formed by the independent reaction between the . functional groups. of simple monomer units. In step-growth, each step may consist of a combination of two polymers having a different or same length to form a longer length molecule..