EFFECT ON PRODUCT PROPERTIES

The Merrill and Hamrin criterion was derived for a first-order reaction. It should apply reasonably well to other simple reactions, but reactions exist that are quite sensitive to diffusion. Examples include the decomposition of free-radical initiators where a few initial events can cause a large number of propagation reactions, and coupling or cross-linking reactions where a few events can have a large effect on product properties. 

Ziegler catalysts studied for the oligomerisation of a-olefins tend to be based on modified first-generation catalysts, i.e. triethylaluminium/titanium tetrachloride. The aluminium/fitanium ratio has a marked effect on product properties, at less than 0.8 1, liquids were produced, whereas at ratios above 1 1, waxy products were obtained [6, 7]. This effect is believed to relate to changes in the catalysis mechanism, from cationic to anionic with higher proportions of aluminium. 

Similar to Chapter 11, the consistent breakdown of information is used to discuss antiblocking, release, and slip agents in various groups of products. Depending on the available information data are allocated to one of five sections T es and concentrations, reasons for use, advantages and disadvantage of additive use, effect on product properties, and examples of formulations. The discussion includes 29 groups of products. 

---