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    31.
    发明专利
    未知

    公开(公告)号：DE10129525A1

    公开(公告)日：2003-01-09

    申请号：DE10129525

    申请日：2001-06-21

    Applicant: BASF AG

    Inventor： EMRI IGOR ,  BERNSTORFF BERND-STEFFEN VON ,  RAUSCHENBERGER VOLKER ,  HORN HANS CHRISTOPH

    IPC: C08L67/00 ,  C08L67/02 ,  C08L77/00 ,  C08L77/02 ,  C08L77/06 ,  C08L77/12 ,  C08G63/83 ,  C08G69/04 ,  C08K7/16 ,  C08J3/11 ,  C08J5/02 ,  C08L51/06

    Abstract: A thermoplastic polymer mixture comprising m polymers Pn, where m is a natural number greater than 1 and n is a natural number from 1 to m, where n is a natural number from 1 to m, where each of the polymers has one or more functional groups of the structure -(R )x-C(O)-(R )y- present as repeat units in the main chain of polymer Pn where x and y, independently of one another, are 0 or 1, and x+y=1 R and R , independently of one another, are oxygen or nitrogen bonded into the main polymer chain, where in the differential distribution curve W(M) determined to DIN 55672-2 in hexafluoroisopropanol as eluent the polymer mixture has at least two maxima of the relative frequency W, and after aging of the polymer mixture at the melting point of the polymer mixture determined to ISO 11357-1 and 11357-3 for 5 minutes, the polymer mixture has in the differential distribution curve W(M) determined to DIN 55672-2 in hexafluoroisopropanol as eluent at least 2 maxima of the relative frequency W, and the position of the maxima here after aging of the polymer mixture at the melting point of the polymer mixture is within three times the recurrent standard deviation sigma(r) of MP in percentage of the value measured to DIN 55672-2, based on the position of the maxima prior to aging of the polymer mixture at the melting point of the polymer mixture.

    Characterisation of partially crystalline polymers, to establish suitability for orientation
    34.
    发明专利
    Characterisation of partially crystalline polymers, to establish suitability for orientation 未知

    公开(公告)号：DE19813400A1

    公开(公告)日：1999-09-30

    申请号：DE19813400

    申请日：1998-03-26

    Applicant: BASF AG

    Inventor： RAUSCHENBERGER VOLKER ,  HINGMANN ROLAND ,  LANGHAUSER FRANZ ,  SCHOENE WERNER

    IPC: G01N11/00 ,  G01N33/44 ,  C08J5/18

    Abstract: Rheological properties determine the suitability for biaxial orientation. The suitability of a partially crystalline polymers, especially a polypropylene polymer, for the preparation of biaxially oriented foils and films can be decided by determination of its rheological properties. The method involves determination of the viscosity change with temperature in the region of the melting point, definition of a characteristic quantity in such a way that its value is inversely related to the viscosity change with temperature, determination of the extent of strain hardening on partial melting of the polymer, for which a characteristic quantity is so defined that its value is the greater the more marked the strain hardening. Both characteristic quantities when multiplied together are coupled to an end characteristic quantity, so that the suitability of the partially crystalline polymer is the better the larger the value of the end characteristic quantity.

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