摘要:

AbstractEs wird der Einfluß von Mischungen substituierter Phenole mit Schwefelverbindungen auf die thermooxidative Stabilität von Polypropylen verfolgt. Aus der Gruppe der substituierten Phenole wurde 4,4′‐Butyliden‐bis(3‐methyl‐6‐tert.‐butylphenol), 2,2′‐Methyliden‐bis(4‐methyl‐6‐tert.‐butylphenol) und 4,4‐Thio‐bis(3‐methyl‐6‐tert.‐butylphenol) angewandt. An Schwefelverbindungen wurden Phenylalkylsulfide, p‐Nitrophenylalkylsulfide und einige andere p‐substituierte Phenylsulfide verwendet. Die Wirkung der Mischungen der angeführten Stoffe wu

ISSN:0003-3146    

DOI:10.1002/apmc.1980.050840111

出版商:Hüthig&Wepf Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractThe thermal stability of poly(vinyl chloride) (PVC) and thermoplastic polyurethane (PU) blends has been studied in this work. It has been found that the PVC/PU blends possess lower thermal stability than unmodified PVC. No effect of the structure of polyurethanes or their content on the stability of PVC/PU system has been found.

ISSN:0003-3146    

DOI:10.1002/apmc.1980.050840112

出版商:Hüthig&Wepf Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractThe homopolycondensation of salicyloyl chloride was carried out in presence of nitrobenzene as a solvent to prepare poly(o‐phenylene carboxylates). The resulting polyesters when treated with Friedel‐Crafts catalyst do not undergo Fries migration. This is contrary to reported investigations. The synthesized polyesters were insoluble in common organic solvents and are characterized by IR, viscosity study and thermal analysis. Kinetic parameters are evaluated from DTA tra

ISSN:0003-3146    

DOI:10.1002/apmc.1980.050840113

出版商:Hüthig&Wepf Verlag    

年代:1980

数据来源: WILEY

摘要:

AbstractGraft copolymerization of methyl methacrylate onto silk was investigated in aqueous solution using potassium peroxydiphosphate as initiator. The rate of grafting was determined by varying monomer, peroxydiphosphate ion, temperature, and solvent. The graft yield increased with increasing peroxydiphosphate ion upto 8 × 10−3mol/1 and with further increase of peroxydiphosphate ion the graft yield decreased. The graft yield increased with increasing monomer concentration upto 9 wt.‐% and with further increase of monomer the graft yield decreased. The rate of grafting increased with the increase of temperature. The effect of acid and water soluble solvents and salts on graft yield was investigated and a suitable rate expression was der

ISSN:0003-3146    

DOI:10.1002/apmc.1980.050840114

出版商:Hüthig&Wepf Verlag    

年代:1980

数据来源: WILEY

ISSN:0003-3146    

DOI:10.1002/apmc.1980.050840115

出版商:Hüthig&Wepf Verlag    

年代:1980

数据来源: WILEY