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 . In addition to substitution, alkyl halides can also undergo elimination reactions, which lead to the formation of alkenes.. As with substitution reactions, elimination reactions come in two mechanistic types:. 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. Molecular . weight and its determination,. amorphous and crystalline polymers, biopolymers, structure-property relation in polymers.. Polymer. The word, . polymer. , implies that polymers are constructed from pieces (. 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 . The . risk for development of a drug eruption is related to the following factors: age, gender, dose, and the nature of the medication itself. . Females . are . 1.3-1.5 . times more likely to develop drug eruptions, except in children under the age of 3 where boys are more likely to be affected. . Our estimates of pressures and temperatures experienced by rocks during metamorphism are based on metamorphic reactions.. Mineral Reactions. There are two basic types of mineral reactions:. Continuous. Objective. To know about . electrophilic. substitution reactions. Success criteria. Understand . the mechanism of the . electrophilic. substitution reactions of . benzene. Understand this for . halogenation. Write your answer in your. . science journal.. Quiz. 1. How . many molecules of oxygen gas in the reactant (O. 2. ) are needed to balance this equation?. CH. 4. + O. 2. → 2CO. 2. + 4H. 2. O. 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..