Studies of a polymerizable crystal : I. - structure of monomer pts (bis-p-toluenesulphonate of 2,4-hexadiyne 1,6-diol) by neutron diffraction at 120 and 221 k

Abstract

Studies of a polymerizable crystal : I. -structure of monomer pts (bis-p-toluenesulphonate of 2,4-hexadiyne 1,6-diol) by neutron diffraction at 120 and 221 k.

Structural study of two reactive diacetylenes

“…Structural studies in that temperature range can only be performed by neutron diffraction. At low enough temperature, chain propagation in DA crystals becomes blocked [20]; this allowed a few low temperature structures to be obtained using X-rays [5,[21][22][23].…”

Formation of periodic crack structures in polydiacetylene single crystal thin films

“…(bo -bl ) depends on the degree of polymerization and also on temperature. The variation of the unit cell parameters with temperature is known for TS-6 [12][13][14] : bobl decreases with temperature. It can then be checked whether Rc as predicted by equation (11) also depends on temperature.…”

“…A large amount of experimental data are available for this diacetylene and for the corresponding polymer. In particular, the crystal structure of the monomer [1] and of the polymer [2] is known. Both crystals are monoclinic, of space group P2 1 / and the polymeric chains grow along the b crystal axis.…”

“…Expérimental part. 1.1 EXPERIMENTAL METHOD. -Single crystal thin films of poly-TS-6 are obtained using monoenergetic electron irradiation as the polymerizing agent [4].…”

Dielectric Study of Pure Polymer and Mixed Monomer-Polymer Single Crystals of pTS Diacetylene: a Comparison with Neutron Scattering Results

“…Both monomer and fully polymerized pTS-H and pTS-D are isostructural [5][6][7][8][9][10]. In the fully polymerized crystals, an antiferroelectric phase transition takes place at Τ = 190 Κ [10][11][12].…”