The synthesis of a polydimethylsiloxane chain with a random distribution of deuterated and non-deuterated methyl groups is described. Cationic polymerization provides an excellent mechanism for statistical sequencing. The test for randomness is given by a neutron scattering experiment on a semidilute solution. In the reciprocal interval (1 x 10-2 A-1, 1 x 10-1 .~-1), the response is uniformly devoid of any copolymer correlation effect. A totally furtive chain can thus be inserted in a polymer solution, at zero average contrast between deuterated and non-deuterated chains.
Посилання на статтю:
Synthesis and test of a statistical copolymer the furtive chain / A. Lapp*, J. P. Cotton and G. Jannink // Polymer. – 1993. – Vol 34. – P. 3302-3304.