摘要:

The dependence of the rate constant of free-radical decay on pressure in γ-irradiated polycarbonate has been studied in the temperature range between 90°C and 200°C at up to 800 MPa on the basis of the changes in ESR spectra. The results are compared with data about mechanical relaxations which provide information on molecular motions. The correlation between molecular motions in the α-relaxation region and radical decay is painted out.

ISSN:0022-2348    

DOI:10.1080/00222347708208759

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

It is shown by various means that a significant amount of order exists in the crystalline bulk and in the fold surfaces of lamellar crystals crystallized from the supercooled melt. Analysis of viscoelastic relaxation times and isothermal crystallization rates leads to the conclusion that lamellar crystals showing a significant measure of internal and fold surface order are incompatible with the existence of Gaussian random coils in the supercooled polymeric melt.

ISSN:0022-2348    

DOI:10.1080/00222347708208760

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor