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LARC-TPI 1500 series controlled molecular weight polyimideLARC-TPI, a linear high temperature thermoplastic polyimide, was developed several years ago at NASA Langley Research Center. This material has been commercialized by Mitsui Toatsu Chemicals, Inc., Tokyo, Japan, as a varnish and powder. More recently, a melt-extruded film of a controlled molecular weight of this same polymer has been supplied to NASA Langley Research Center for evaluation. This new form, called LARC-TPI 1500 series, has been prepared in three molecular weights - high, medium and low flow polymers. The subject of this investigation deals with the rheological properties of the high and medium flow powders and the adhesive properties of the medium flow melt-extruded film. Rheological studies indicate that the high and medium flow forms of the polymer fall in the flow range of injection moldable materials. Adhesive data generated on the medium flow extruded film shows this form to be well suited for structural adhesive bonding. The data are as good or better than that for LARC-TPI data of previous studies.
Document ID
19900038169
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Progar, Donald
(NASA Langley Research Center Hampton, VA, United States)
St. Clair, Terry
(NASA Langley Research Center Hampton, VA, United States)
Burks, Harold
(NASA Langley Research Center Hampton, VA, United States)
Gautreaux, Carol
(NASA Langley Research Center Hampton, VA, United States)
Yamaguchi, Akihiro
(Mitsui Toatsu Chemicals, Inc. Yokohama, Japan)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Publication Information
Publication: SAMPE Journal
Volume: 26
ISSN: 0091-1062
Subject Category
Nonmetallic Materials
Accession Number
90A25224
Distribution Limits
Public
Copyright
Other

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