Copolymers containing diethylsiloxane and functional siloxane groups of the form RR'SiO (where R = phenyl, and R'= ethyl or methyl) were synthesized by equilibrium polymerization of the appropriate cyclotrisiloxanes in the presence of KOH. Quantitative 29Si n.m.r, spectroscopy indicated that the copolymers possessed random microstructures. Differential scanning calorimetry (d.s.c.) analysis showed that both substituents are effective in lowering the crystal melting and low-temperature crystal-crystal transitions with respect to the diethylsiloxane homopolymer, and ultimately lead to non-crystalline copolymers
Посилання на статтю:
Poly( d i et hylsi Io xane- co-ethyl p h e nyls i Io xane ) and poly(diethylsiloxane- comethylphenylsiloxane): synthesis and characterization / J. R. Brewer*, K. Tsuchihara and R. Morita // Polymer. – 1994. – Vol 35. – P. 5118-5123.