Multipolymer systems

The number of two-polymer, multipolymer, and multimonomer systems reported in the scientific and patent literature continues to rise without an adequate nomenclature to describe the several materials. This chapter is divided into three parts. (1) A proposed nomenclature system which uses a short list of elements (polymers or polymer reaction products). These elements are reacted together in specific ways by binary operations which join the two polymers to form blends, grafts, blocks, crosslinked systems, or more complex combinations. (2) The relationship between the proposed nomenclature and the mathematics of ring theory (a form of the new math9 ) is discussed. (3) A few experimental examples now in the literature are mentioned to show how the new nomenclature scheme already has been used to discover new multipolymer systems. 

Another option is the use of both solid-supported versions of the catalyst and the co-oxidant. The Toy group in Hong-Kong has developed a multipolymer system for the TEMPO-catalyzed alcohol oxidation in which both the pre-catalyst and the co-oxidant are attached to a polymer. As it was clearly impossible to use two insoluble supported reagents, the idea was to use an insoluble polymer in conjunction with a soluble one. An insoluble polymer-supported diacetoxyiodosobenzene (PSDIB), an analog of 10, and a soluble polymer-supported TEMPO were used,... 

Another area which is growing rapidly is multicomponent polymer systems. As noted in the section on structure and properties, block polymers should contribute special properties to multipolymer systems. 

Today, one of the most challenging areas concerning phase separated multipolymer materials relates to the prediction of the domain sizes. Various preparation techniques yield very different dimensions. Much theoretical work on domain size prediction has been done on block polymer, as mentioned above, but not other multipolymer systems. 

Historically, blending was used to improve the impact strength of the early resins, i.e., toughening of PS, PVC, PMMA, PET, PA, etc. With time, blends evolved into multipolymer systems that not only have to be impact modified but also compatibilized. Many blends have been formulated with a multicomponent modifier that simultaneously compatibilizes and impact-modifies the mixtures. 

A Nomenclature for Multipolymer Systems proposed nomenclature is shown by... 

While reviewing all of the applications of group and ring theory to multipolymer systems and compound crosslinking is beyond the scope of this paperl2,13 it is important to note that a number of theorems can be brought into play. Some of these deal with functions, which spell out the rules by which an element can be moved from one table to another, or to a different position within the table. For example. Table IV codified systems that are... 

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