摘要:

AbstractContract electrification measurements were performed on polymeric particles containing toluenesulfonate salt. Two forms of the toluenesulfonate ion pair were studied, an ionomer, poly(styrene‐co‐N‐methyl‐4‐vinylpyridinium toluenesulfonate) and a molecular salt, cetyltrimethylammonium toluenesulfonate. Both types of particles charge positive, and the ionomer produces the higher charge level. XPS analysis shows that the particles containing the ionomer have a surface salt composition that resembles the formulation composition, whereas the surface salt composition of the particles containing the molecular is significantly higher than in the formulation. The variation in the surface ion concentration is used to estimate a relative charging capacity of the salts. XPS analyses of the carriers that were used with both particles shows an S 2p signal appropriate for the toluenesulfonate anion. A mechanism for charging involving the transfer of the toluenesulfonate anion from polymer particles to the carrier is

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280301

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY

摘要:

AbstractA new method for electrochemical polymerization of aniline is presented in which a small amount ofp‐aminodiphenylamine is added to the polymerization system. In the presence ofp‐aminodiphenylamine, the rate of polymerization increases greatly, the lower potentials can be applied to generate polyaniline with probably improved quality owing to fewer side reactions, and the more uniform polyaniline films can be prepa

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280302

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280303

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY

摘要:

AbstractThe propoxylation of lactose (a dairy waste by‐product), under basic conditions, yields polyether polyols that have been found to be a good substitute for sucrose polyether polyols currently used in the rigid polyurethane foam industry.13C‐NMR analysis of polyethers of sugars indicate that while the disaccharide α (1 → 2′) linkage of sucrose remains intact during propoxylation, that of lactose breaks, giving polyethers of monosaccharides. In addition, IR spectra reveal the absence of unsaturation in the product. The presence of multiplicities of the different carbon peaks of propylene oxide in the NMR spectrum of the product implies a regioselective attack on the C‐1 or C‐2 of propylene oxide by the incoming

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280304

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280305

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280306

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280307

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY

ISSN:0887-6258    

DOI:10.1002/pol.1990.140280309

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1990

数据来源: WILEY