Poly structure below

Other epoxy resins are also being manufactured, but their commercial j utilization is not so far advanced as those based on bisphenol A and i epichlorohydrin. For instance, resorcinol and a mixture of diphenol-poly-(hydroxyphenyl)-pentadecanes, obtained by the addition reaction of phenol with an unsaturated phenol derived from cashew-nut oil (see structure below) can be reacted with epichlorohydrin to produce epoxy resins. ... 

A common example of a plasticized polymer is poly(vinyl chloride). The common atactic form has a Tg of about 80° C, well above room temperature. Without a plasticizer, vinyl is stiff and brittle. Dibutyl phthalate (see the structure below) is added to the polymer to lower its glass transition temperature to about 0° C. This plasticized material is the flexible, somewhat stretchy film we think of as vinyl raincoats, shoes, and even inflatable boats. Dibutyl phthalate is slightly volatile, however, and it gradually evaporates. The soft, plasticized vinyl gradually loses its plasticizer and becomes hard and brittle. 

A temperature resistant plastic called poly(phenylene oxide) is a key component of resins such as GE s Noryl , which is widely used in computer cases and automobile dashboards. The line structure below represents 2,6-dimethyl phenol, which is the monomer from which poly(phenylene oxide) is made. What is the molecular formula for 2,6-dimethylphenol ... 

Vinyl-2-Pyrrolidone n (N-vinyl-2-pyrrolidone) A cyclic monomer derived from acetylene and formaldehyde, with the structure below. See Poly(l-Vinylpyrrolidone). 

After treated polymers with imprecisely-defined structures, e.g., chlorosulphonated poly-ethylene (below), were indexed in CIS by a C-Number representing POLYETHYLENE, AFTERTREATED AND A GENERAL TERM, e.g., POLYAFT-CHLOROSULPHONATED. Intersecting these terms gave some false correlation when searched. 

In fact, considering the basic structure of these materials (vide supra), it can be immediately realized that the basic features of poly(organophosphazenes) are the result of two main contributions. The first one is fixed and is basically related to the intrinsic properties of the -P=N- inorganic backbone, while the second is variable and mostly connected to the chemical and physical characteristics of the phosphorus substituent groups. Skeletal properties in phos-phazene macromolecules intrinsically due to the polymer chain are briefly summarized below. 

The most known and investigated substrate of this class is poly[bis(trifluo-roethoxy)phosphazene], PTFEP, a polymer formally derived by the general formula above by putting x=y=l and Z=R The general structure of this compound is shown below. 

Both theoretical and experimental evidence suggest that the precise nature of the charge carriers in conjugated polymer systems varies from material to material, and it is still a subject of debate in many cases. A discussion of the various theoretical models for the electronic structure of conjugated polymers is given below, using polyacetylene and poly(paraphenylene) as examples. More detailed information on these materials and the applicability of these theoretical models is given in subsequent sections. 

Fig. 20 (a) Qiemical structures of poly Glc—Asn(/V-isopropyl)]. (b) Photographs showing temperature-responsiveness of poly Glc-Asn(/V-isopropyl) 5% aqueous solution at below (upper) and above (lower) the LCST. [304]... 

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