One-pot synthesis and characterization of aliphatic poly(oxytetramethylene) ionene

Aliphatic poly(oxytetramethylene) ionenes: effect of counter-anion on the properties and morphology

“…Aliphatic POTM ionenes with chloride anions and bromide anions were synthesised by cationic living polymerization of THF using (CF 3 SO 2 ) 2 O (0.23 mol/l) as an initiator at 0 8C under dry nitrogen atmosphere for 5 min, followed by chain-extension reaction by adding six times amounts of N,N 0 -dimethylaminotrimethylsilane relative to the concentration of the initiator at 0 8C [33]. The yield was 16%.…”

“…The intrinsic viscosity of IP-Cl and IP-Br were 0.58 and 0.55 dl/g, respectively. In our previous paper, the weight average molecular weight (M w ) of IP-Br, whose intrinsic viscosity was 0.44 dl/g in 0.1N methanol solution of ammonium bromide at 30 8C, was measured to be 48,000 g/mol by a light scattering measurement [33]. Although the M w of IP-Cl and IP-Br studied here was not measured, it was estimated to be larger than 48,000 g/mol.…”

“…1. The samples with Cl K and Br K are abbreviated as IP-Cl and IP-Br, respectively Since a living poly(oxytetramethylene) (POTM) can be reacted with nucleophiles to give various kinds of macromolecules such as amphiphilic and ionic linear polymers, star polymers, graft polymers and networks, the many studies on the ring-opening polymerization of tetrahydrofuran (THF) and characterization of the obtained macromolecules have been reported [8][9][10][11][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. However, the relationship between the properties and morphology of POTM ionenes has not been well understood, although the ionenes showed excellent mechanical properties.…”

Reaction of N-[chloro(diorganyl)silyl]anilines with isopropanol and isopropylamine

“…N-Silylamines have found wide application in organic synthesis as synthons [1][2][3][4][5] and silylating agents [6][7][8][9] as well as in the material science as precursors for preparation and modification of polymer materials [10][11][12][13], protecting films [14,15], and advanced materials based on silicon nitride and oxynitride [16][17][18][19][20]. The first reports on synthesis of polyfunctional silanes of the general formula R 1 R 2 Si· (Cl)NR 1 R 2 (R 1 , R 2 = H, Alk, or Ar) date back to the second half of the XX century [20][21][22][23][24][25], and some data on their chemical properties have been published [26,27].…”