公开(公告)号：EP0716750A1

公开(公告)日：1996-06-19

申请号：EP94925197.0

申请日：1994-08-05

申请人： AUBURN INTERNATIONAL, INC.

发明人： DECHENE, Ronald, L., c/o Auburn Internat.Inc. ,  SMITH, Thomas, B., c/o Auburn Internat.Inc. ,  DAY, David, R., c/o Auburn International Inc. ,  TANZER, Christian, I., c/o Auburn Internat.Inc. ,  TACHE, Ronald, J., c/o Auburn Internat.Inc. ,  ROY, Ajoy, K., c/o Auburn Internat.Inc.

IPC分类号： G01N24 ,  G01R33

CPC分类号： G01N24/085 ,  G01R33/31 ,  G01R33/563

摘要： A pulsed nmr analysis system (figure 1a) for polymer materials (S2) extracted from industrial processes at a mobility enhancing temperature (figure 3) (at or above glass transition temperature for amorphous polymers, at the crystalline transition temperature for crystalline and semi-crystalline polymers). The sample is measured via nmr techniques and results correlated to viscosity and melt index or melt flow (which are related to average molecular weights). Substantial improvement of correlation of nmr derived constants and equations of a free induction decay curve with the foregoing polymer properties is obtained via (1) conducting the nmr process at a mobility enhancing temperature (normally elevated compared to the industrial process temperature of the industrial process) and (2) holding temperature substantially constant at such elevated temperature.