ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Bis-isopropyl xanthogen (“dixie”) is a poor promoter, but an effective modifier, in the GR-S recipe, as was concluded from unreported intrinsic viscosity measurements. High molecular mercaptans are good promoters but very poor modifiers. In recipes containing mercaptans as promoters, dixie acts like a retarder until a conversion of 30% is attained. After this conversion the rate becomes normal. It is found that at a conversion of 30% most of the dixie has been dissipated. Bis-isopropyl xanthogen can be determined polarographically. A procedure is given for the polarographic determination of dixie and the determination by amperometric titration of mercaptan when both dixie and mercaptan are present in a GR-S latex. Disappearance curves of dixie and of mercaptans are given when both modifiers are present in the original charge.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1949.120040606