Poly alkanes

ECPBs were prepared by melt blending a matrix polymer (selected from between PE, PP, PB, PIB, PMP, EPR, CPE, CSR, PS, poly-alkanes containing styrene, acryl, vinyl, or fluoro-ethyl... 

Thermo-oxidative Degradation of Poly(alkane imide) [12-29]... 

Isochains and heterochains may be substituted or unsubstituted. Here, the different significances of the word substitution in inorganic and organic chemistry must be noted. In the strictest sense, unsubstituted isochains occur in cflr/ na-poly(sulfur). On the other hand, silanes, H(SiH2)nH, should be considered as substituted in the sense of inorganic nomenclature. By contrast, the poly(alkanes), H(CH2)nH, are considered to be unsubstituted chains in organic chemistry, since the basic structure is here considered to be the alkanes, and not diamond. 

The whole of organic chemistry depends, finally, on the ability of carbon to form isochains. Diamond, as three-dimensional carbon, can, for example, be systematically named as /ec/o-poly(carbon) as is well known, it is the basic structure from which the alkanes may be derived. Alkanes, or poly(alkanes), with the main chain R(CH2)a R, can be obtained with practically infinitely high chain link numbers. 

In fluorinated poly(alkanes), the carbon-fluorine bond is very resistant to thermal or chemical scission because of the high bond energy of the C-F bond and the associated decrease in the C-F bond length (Table 25-4). For this reason, a large number of fluorine polymers have been tested for use as thermal and chemical resistance polymers. 

The dominant feature of all commodity plastics is their relatively low tensile strengths. These lie in the region of 10-37 MPa for the poly(a-olefins) and only assumes higher values with PVC and with PMMA (Table 36-5). On the other hand, the poly(alkanes) have quite a high elongation at break, which predestines their use as packaging films (see also Table 36-1). In contrast, the elongations at break of PVC and PS are very low. 

Gasslander, U. Jaegfeldt, H. Stability and extraction features in the determination of Irganox-1330 in a poly-alkane copolymer. Anal. Chim. Acta 1984, 166, 243-251. 

Polysubstituted thiophenes with other groups different to w-alkyl chain are also known. For example, alkylsulfonate, alkoxy, amide, poly(ether), and acylgroup were introduced in 3-position in thiophene and their electroobtained polymers were studied. A water soluble poly(alkane)sulfonatederivative of thiophene has also been reported [55] which would be an intrinsically conducting polymer (self-doped). Composites of poly(thiophene)s with poly(methylmethacrylate) and poly(vinylchloride) were prepared as... 

Irrespective of these differences, both approaches have proved to be extremely successful for the preparation of dendritic macromolecules. By the use of either the divergent or convergent growth approaches a number of different groups have prepared dendrimers based on a wide variety of functional groups i.e. dendritic poly(amides) (5), poly(etherketones) (6), poly(amines) (7), poly(phenylenes) (8), poly(silanes) (9), poly(phosphonium salts) (10), poly(esters) (11), poly(phenylacetylenes) (12), poly(alkanes) (13), etc. Interesting variations on this theme have been the preparation of optically active dendrimers (14), dendritic poly(radicals) (15), and dendrimers based on co-ordination chemistry with... 

TABLE 10. POLY(DIENES), POLY(ALKANES), POLY(VINYLS)... 

Glass-Filled Composite Materials Derived from Poly(Alkane Imide) (PAl)... 

Another monomer which can be produced from renewable resources is succinic acid or its anhydride. Aliphatic polyesters of succinic acid are crystalline and biodegradable. Particularly interesting and commercial is poly(l,4-butanediol succinate), because its melting temperature (Tm = 120 °C) is higher than that of all other polyesters from a,m-alkanediols. For most syntheses of poly(alkane succinate)s described in the literature succinic acid was used as monomer, but... 

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