摘要:

AbstractThe phase separation in solutions of high polymers in the same solvent (technically known as incompatibility) has been studied for fourteen high polymers (cellulose, vinyl, and acrylic derivatives) dissolved in thirteen solvents. The influence of solvent, concentration, molecular weight and constitution of the macromolecules has been studied for 78 mixtures: the results are represented in triangular diagrams. Incompatibility appears to be the normal situation, compatibility the exception. Moreover, in cetain cases the exception may be only apparent. Phase separation is discussed in its relation to osmotic pressure, solubility, and the isomorphism of the molecules. Phase separation furnishes new means—useful at leat for technical research—of measuring the molecular weight of macromolecules. It is a simple and rapid proced

ISSN:0022-3832    

DOI:10.1002/pol.1947.120020111

出版商:Interscience Publishers, Inc.    

年代:1947

数据来源: WILEY

摘要:

AbstractFrom data in the literature on relative rates of copolymerization it has been possible to evaluate two constants, Q and e, characteristic of an individual monomer, which appear to account satisfactorily for its behavior in copolymerization. The constant Q describes the “general monomer reactivity” and is apparently related to possibilities for stabilization in a radical adduct. The constant e takes account of polar factors influencing copolymerizat

ISSN:0022-3832    

DOI:10.1002/pol.1947.120020112

出版商:Interscience Publishers, Inc.    

年代:1947

数据来源: WILEY

ISSN:0022-3832    

DOI:10.1002/pol.1947.120020113

出版商:Interscience Publishers, Inc.    

年代:1947

数据来源: WILEY

ISSN:0022-3832    

DOI:10.1002/pol.1947.120020116

出版商:Interscience Publishers, Inc.    

年代:1947

数据来源: WILEY

ISSN:0022-3832    

DOI:10.1002/pol.1947.120020117

出版商:Interscience Publishers, Inc.    

年代:1947

数据来源: WILEY