Accession Number:

ADA242571

Title:

Molecular Dynamics of Polycarbonate Chains at the Interface of Polycarbonate/Polystyrene Heterogeneous Blends

Descriptive Note:

Technical rept.,

Corporate Author:

WASHINGTON UNIV ST LOUIS MO DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1991-11-14

Pagination or Media Count:

19.0

Abstract:

Having generated and identified a carbon thirteen NMR signal arising exclusively from PC chains the PCPS interface, we can now perform NMR relaxation experiments to characterize the microscopic dynamics of these chains. A difference pulse sequence is used which includes a period for carbon dephasing under the influence of dipolar coupling to protons isolated from one another by multiple-pulse H-H decoupling. Thus, the full experiment involves monitoring the dephasing of DNP-enhanced 13C NMR magnetization of interface PC chains in a thin-film PCPS blend by dipolar rotational spin echo DRSE 13 C NMR. The results of DRSE experiments have been well established for the characterization of the molecular chain dynamics of synthetic polymers and proteins.

Subject Categories:

  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE