Di-n-butyl itaconate

Table 14. Refractometric data and apparent LS molecular weight of a styrene (A)/di-n-butyl itaconate (B) copolymer1 59 of composition WA = 0.169...

The use of simultaneous equations with at least three sets of experimental data can, however, be applied to Eq. (101) or (102) to yield M, MA and MB. This is especially useful, if the specific co-ordinates of the whole parabola cannot be realised experimentally as is often the case. The data159-1 in Table 14 relate to a random copolymer of styrene (A)/di-n-butyl itaconate (B) in which WA = 0.169. Solution of simultaneous equations [Eq. (101)] yields M = 67300, MA = 56800 and MB =64700. The compositional heterogeneity is such that the data conform to the required theoretical relationship149 ... 

Lee, M., Ferguson, R., Jamieson, A.M., Simha, R., Cowie, J. M. G., Photon correlation spectroscopy study of poly(di-n-butyl itaconate) near Tg, Polymer communications Guilcford, 26(3), pp. 66-69 (1985). 

Hirano, T. Tateiwa, S. Seno, M. Sato, T. Temperature dependence of stereospecificity in the radical polymerization of di-n-butyl itaconate in bulk. 7. Polym. ScL, Part A Polym. Chem. 2000, 38, 2487-2491. 

Poly(di-n-butyl itaconate-stat-mono butyl itaconate)... 

Hirano T, Higashi K, Seno M, Sato T. Radical polymerization of di-N-butyl itaconate in the presence of Lewis acids. Eur Polym J. 2003 39 1801-1808. 

Fig. 12. Damping spectra for a series of poly(di-n-alkyl itaconate)s. Methyl (A), ethyl (B), propyl (C), butyl (D), pentyl (E), and hexyl (F) derivatives. The p relaxation can only be resolved in (A), (B), and (C). ("Reproduced from J.M.G. Cowie, S.A.E. Henshall, I.J. McEwen, and J. Velickovic, Polymer, 18, 612 (1977), by permission of the publishers, Butterworth and Co. (Publishers) Ltd. ").

Copolymers of diallyl itaconate [2767-99-9] with AJ-vinylpyrrolidinone and styrene have been proposed as oxygen-permeable contact lenses (qv) (77). Reactivity ratios have been studied ia the copolymerization of diallyl tartrate (78). A lens of a high refractive iadex n- = 1.63) and a heat distortion above 280°C has been reported for diallyl 2,6-naphthalene dicarboxylate [51223-57-5] (79). Diallyl chlorendate [3232-62-0] polymerized ia the presence of di-/-butyl peroxide gives a lens with a refractive iadex of n = 1.57 (80). Hardness as high as Rockwell 150 is obtained by polymerization of triaHyl trimeUitate [2694-54-4] initiated by benzoyl peroxide (81). 

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