Poly l-hexene

1-Hexene is one of the most commonly employed monomers for detailed studies of living olefin polymerization due to the fact that it is an easily handled liquid, and molecular-weight 

---

The high sensitivity of poly(olefin sulfone)s to chain scission by radiation was first discovered for poly(l-butene sulfone) and poly(l-hexene sulfone) by Brown and 0 Donnell °,... 

Alkane dehydrogenation has been demonstrated as a suitable method for the functionalization of polyolefins such as atactic poly(l-hexene) under homogeneous conditions (Equation 12.6) [23]. 

Higher aliphatic 1-alkenes exhibit a slightly lower reactivity as compared with propene, but the head-to-tail as well as isotactic selectivity is as high as that observed for propene [132,133], The copolymers arising from higher 1-alkenes tend to possess the poly spiroketal form more extensively as compared with the propene/CO copolymer. For example, poly(l -hexene-a/r-CO) exists as a mixture of polyketone and polyspiroketal, even in a CDC13 solution based on 13C NMR analysis [133]. 

The relative insensitivity of this class of Ni catalysts to polar functional groups, and especially their low oxophilicity, is another important characteristic. This property has been exploited for the development of novel polymeric materials that might find new applications. For example, 1-hexene has been copolymerized with 6-(2-ureido-4-[lH]-pyrimidinone)hex-l-ene (30) to generate a new poly(olefin) elastomer (equation 7). The dimerization (through H-bonding) of the pyrimidinone moieties forms noncovalent crosslinks that bestow unique properties to the otherwise amorphous poly(l-hexene) matrix. 

Results for a Py-GC/MS analysis of poly(l-hexene-sulfone) CAS 34903-07-6 with the idealized structure [-CH(C4H9)-CH2-S02-CH2-CH(C4H9)-S02- ] are shown in Figure 12.2.1. The pyroiysis was done in similar conditions as for other examples, at 600° C in... 

As seen from Table 12.2.2, the main pyrolysis products of poly(l-hexene-sulfone) are SO2 and 1-hexene. However, some other fragment molecules are generated by various types of reactions such as hydrogen transfer, cyclization, etc. Typical examples are 2-ethylthiophene, 3-ethylthiophene, and 2,5-dibutylthiophene. 

Syndiotactic poly( 1-pentene), poly(l-hexene), and poly( 1-octene) have been described.936... 

---