Detail of "26655-94-7"

Reference

Blends containing polymers of epichlorohydrin and ethylene oxide

Blends containing polymers of epichlorohydrin and ethylene oxide. Part I: Polymethacrylates. Fernandes, A. C.; Barlow, J. W.; Paul, D. R. (Cent. Polym. Res., Univ. Texas, Austin, TX 78712, USA). J. Appl. Polym. Sci., 32(6), 5481-508 (English) 1986. CODEN: JAPNAB. ISSN: 0021-8995. DOCUMENT TYPE: Journal CA Section: 39 (Synthetic Elastomers and Natural Rubber) Section cross-reference(s): 36 The phase behavior of blends of various polymethacrylates with polyepichlorohydrin (I) [24969-06-0] rubber, poly(ethylene oxide) (II) [25322-68-3], and epichlorohydrin-ethylene oxide copolymer (III) [24969-10-6] rubber was examd. using DSC, dynamic mech. properties, and optical indications of phase sepn. on heating, namely lower crit. soln. temp. 25768-50-7 and 24969-10-6 are cas registry numbers of chemicals which are used as reagents here. (LCST) behavior. PMMA [9011-14-7], was miscible with I, II, and III while only I was miscible with poly(ethyl- [9003-42-3], poly(n-propyl- [25609-74-9], poly(n-butyl- [9003-63-8], poly(cyclohexyl- (IV) [25768-50-7], and poly(iso-Pr methacrylate) [26655-94-7] (partially miscible). In many cases, unusually broad glass transitions were obsd. by DSC for blends which were the result of equil. compn. fluctuations. All mixts. showed LCST behavior and based on this and excess vol. measurements, qual. conclusions were made concerning the relative strength of the interactions among the various blend pairs. For I, the interaction with polymethacrylates decreased with increasing size of the alkyl pendant group, with IV being a possible exception. The interaction with PMMA was about the same for I and II, but somewhat less for III. The latter was consistent with an intrachain attraction of the comonomers. .

Photochemistry in polymer solids

Photochemistry in polymer solids. 3. Kinetics for nonexponential decay of benzophenone phosphorescence in acrylic and methacrylic polymers. Horie, Kazuyuki; Morishita, Keiko; Mita, Itaru (Fac. Eng., Univ. Tokyo, Tokyo 153, Japan). Macromolecules, 17(9), 1746-50 (English) 1984. CODEN: MAMOBX. ISSN: 0024-9297. DOCUMENT TYPE: Journal CA Section: 36 (Physical Properties of Synthetic High Polymers) Section cross-reference(s): 74 The laser-pulse-excited phosphorescence of benzophenone (I) [119-61-9] molecularly dispersed in poly(Me methacrylate) [9011-14-7], poly(iso-Pr methacrylate) [26655-94-7], and poly(Me acrylate) [9003-21-8] decays nonexponentially for the temp. range Tb < T < Tg, while it decays single-exponentially for both T < Tb and T > Tg of each polymer. The kinetics for the nonexponential decay of I triplet in these polymer matrices at 80-433 K are given by using the diffusion-controlled rate coeff. with a time-dependent transition term from the dynamic quenching process of I triplet by side-chain ester groups of the matrix polymers. The resulting kinetic parameters, namely the reciprocal lifetime, a factor characteristic of the deviation from single-exponential decay, and the diffusion coeff. of interacting groups, reflect mol. motion at the glass transition (Tg) and other secondary transitions (Ta' and Tb) of the matrix polymers.