Detail of "38001-34-2"

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Aggregation kinetics and precipitation phenomena in poly(phenylisocyanide)

Aggregation kinetics and precipitation phenomena in poly(phenylisocyanide). Huang, Jiun-Tang; Sun, Jingxian; Euler, William B.; Rosen, William ( Dep. Chemistry, Univ. Rhode Island, Kingston, RI 02881, USA). Journal of Polymer Science, Part A: Polymer Chemistry, 35(3), 439-446 (English) 1997 Wiley. CODEN: JPACEC. ISSN: 0887-624X. DOCUMENT TYPE: Journal CA Section: 36 (Physical Properties of Synthetic High Polymers) The prepn. of N-phenyl-substituted poly(isocyanide) utilizing a Ni(II) catalyst in methanol yields a brown material having a no.-av.There are some reagents with their cas registry numbers 7718-54-9 and 28390-20-7 are used in this study. mol. wt. of about 2000. Anal. of this "as prepd." polymer indicates that a rigid rod structure is present in the derived solid. Dissoln. of this "as prepd." polymer in halocarbon solvents or THF apparently leads to unraveling of the helical polymer with subsequent aggregation and pptn. of materials that have different properties from the original. These processes have been investigated by NMR, GPC, and light-scattering techniques in THF and other solvents. UV spectroscopy has been utilized to follow the kinetics of the aggregation process in soln. X-ray diffraction (XRD) measurements have been employed to investigate the changes attendant with pptn. An explanation of these observations is offered that implicates the uncoiling of the rigid rod helix as the most important step in defining subsequent phys. and chem.There are some reagents like 38001-34-2 is used in this study. properties of the ultimate amorphous polymer. ..