Polymer nomenclature number average

The prediction of conversion, the range in which the values for number average and weight average molecular masses and the values for polydispersity are expected to lie are presented. In addition a comparison of the model results with the experimental data for the chosen polymer-initiator system is described. Finally the influence of benzoyl peroxide as the initiator in the polymerization of styrene can be compared with other initiator influences such as azo-bis-isobutyronitrile (AIBN) and bis-4-t-butylcyclohexyl peroxydicarbonate (Perkadox 16) reported by other researches (Villermaux and Blavier 1984). The nomenclature for all relationships in the following three sections is given in the Nomenclature chapter. 

PPG [Polypropylene Glycol] Abbreviated to the acronym PPG by the International Nomenclature Cosmetic Ingredient. Polypropylene glycol polymers are named as PPG-x , where x is the average number of propylene oxide (CjHgO) monomer units (e.g., PPG-10). Esters and ethers of polypropylene glycol polymers are named as PPG derivatives (e.g., PPG-10 stearate, PPG-10 lauryl ether). These compounds are generally used as emollients, emulsifiers, humectants, or surfactants. 

For a given polymeric substance represented by an SRU, the repeating part of the molecular formula is enclosed in parentheses with a subscript n. The n value in the molecular formula can represent (1) an unknown value, (2) a variable range, (3) an average value, or (4) a specific integral value of at least 11. There is no lower or upper limit to the average number or range of n to apply SRU nomenclature. An example of a simple SRU polymer is ... 

Subsequently we show some important properties of the moment generating function. This include the number and weight average of the degree of polymerization and other averages, as well as the distribution function. There is a potential confusing situation in nomenclature. In polymer chemistry, the term cumulative distribution is used for what is called in mathematics the cumulative distribution function or simply distribution function. Further, polymer chemistry uses the term differential distribution for the mathematical term probability density function. 

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