Additives for Plastics by J. à těpek, H. Daoust (auth.)

By J. à těpek, H. Daoust (auth.)

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Chemi- I, E cal Division Applications Type* Manufacturer Commercia l exa mples Lubricant Hoechst Wax OP E . 2 (Continued) c sr V> ::l ell ... ;I> 00 V> ell n III ell ~ c: 0 ~ 0- ::l III V> e III ... (') ::3. , Chemical Division Lubricant Hoechst WaxC * I =internal, E = external, i = internal reduced effect. Source : Refs. 33, 34. Interstab Chemicals, Inc. , Chemical Division Interstab G-8257 Lubricant Hoechst VP FE2 Loxiol GIO I, E I, E Octyl stearate Partially esterified polyfunctional alcohols by fatty acid Glyceryl monostearate Glycerol monoricinoleate Fatty acid glyceryl monoesters I, E Fatty acid monoesters Butyl stearate H.

CI~CI ~ . . ~ CI CI CI screened CI a t o m - - f - CI 2. The second group consists of plasticizers having polar groups attached to aliphatic chains. It is called the polar aliphatic group . Esters from aliphatic acids and aliphatic alcohols or alkyl esters of phosphoric acid (such as trioctyl phosphate) are good examples . Their polar groups interact with polar sites on polymer molecules, but since their aliphatic part is rather bulky and flexible, the possibility that polar sites on a given polymer chain might be screened by plasticizer molecules is likely [36].

2. Thermodynamic functions of mixing PE with PIB t sn; ss; so; (0C) (J kg:") T (J kg-I) (J kg-I) 25 100 150 125 83 104 -234 -263 -226 356 343 330 Source : Ref. 10. thermodynamic equilibrium and that their high viscosity prevents them from achieving complete phase separation [3]. It has been mentioned that phase separation exists at the microscopic level (corresponding to the length of a segment) and that this state is produced by the increase in the total enthalpy of the system in the course of the mixing process in most cases [8].

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