A decoupled control law is proposed to control the concentration of monomer in the polymer particles in emulsion homopolymerization, copolymerization and terpolymerization processes and simultaneously to insure the production of a homogeneous polymer composition. Nonlinear geometric controllers are used to calculate the monomer flow rates that accomplish this purpose. The controllers are based ...

In the simplest case, vinyl monomers are named by using the prefix poly in front of the monomer name, e.g. polyethylene. When a monomer name consists of more than one word, or if the name is preceded by a number or letter, the monomer name is placed in parentheses after the word poly, e.g. poly(acrylic acid) or poly(methyl methacrylate). In general, common names of monomers are used rather than...

Cationic polyacrylamides have been employed widely to improve sludge dewatering performance, but the cationic units are randomly distributed in the molecular chain, which restricts the further enhancement of dewaterability. Common template technology to prepare block copolymers requiring a huge number of templates reduces the polymer purity and molecular weight. Here, we adopted the surface-act...

Ethylene vinyl acetate copolymer (EVA) has a successful commercial history in the pharmaceutical industry as a controlled release excipient. The usage covers a wide spectrum of parenteral applications ranging from transdermal drug delivery, contraceptive insertions, subcutaneous implants and mucosal contact forms. The importance and prominence of EVA in parenteral applications has inspired rese...

Carbon-13 NMR analysis after chemical reduction has established the following facts with regard to the structures and formation mechanisms of some chlorine-containing polymers that are prepared by free-radical routes. Poly(vinyl chloride) (PVC) contains chloromethyl, 2-chioroethyl, and 2,4-dichloro-n -butyl branches, as well as long branch structures. Tertiary halogen is present at all of the b...