Detail of "119389-05-8"

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Development of composites using asymmetric addition-type polyimide TriA-PI: development of soluble imide oligomers

Development of composites using asymmetric addition-type polyimide TriA-PI: development of soluble imide oligomers.In this study， 762293-94-7 and 119389-05-8 are also used. Chen, Chun Hai; Takahashi, Kuriko; Sasaki, Ken; Yokota, Rikio (Dep. of Space Science, Organization of Aerospace Research and Development, Japan). Uchu Kozo, Zairyo Shinpojumu, 19th, 75-78 (Japanese) 2003 Dokuritsu Gyosei Hojin Uchu Koku Kenkyu Kaihatsu Kiko. CODEN: UKZSFY. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) 2,3,3',4'-Biphenyltetracarboxylic dianhydride, oxydiphthalic anhydride (I), and 4,4'-diaminodiphenyl ether were polymd. and terminated with 4-phenylethynylphthalic anhydride to prep. oligomers having soly. 40% in NMP. Similar oligomers contg. 2,3,2',3'-biphenyltetracarboxylic dianhydride instead of I were prepd. .

Composite ribbon fabrication with reactive polymers

Composite ribbon fabrication with reactive polymers. Claus, S. J.; Grenoble, R. W.; Sandusky, D. A.; Marchello, J. M.; Johnston, N. J. (National Research Council, Hampton, VA 23681, USA). International SAMPE Technical Conference, 27(Diversity into the Next Century), 854-866 (English) 1995 Society for the Advancement of Material and Process Engineering.Several reagents with their cas registry numbers 119389-05-8 and 159507-08-1 are used here. CODEN: ISTCEF. ISSN: 0892-2624. DOCUMENT TYPE: Journal CA Section: 38 (Plastics Fabrication and Uses) Section cross-reference(s): 37 Fabrication procedures were developed to produce high quality composite ribbon comprising unsized Hercules IM-7 fibers and a phenylethynyl-terminated polyimide powder, and to assess its utility for advanced tow placement (ATP). Differential scanning calorimetry, thermal gravimetric anal. and rheol. characterization of the neat polymer powder were performed and used with an existing heat transfer model to det. initial fabrication conditions. Powder-coated tows were fabricated using a dry powder deposition process at room temp. Two 12k powder-coated yarns were combined to form 6.1-mm wide, 0.127-mm thick ribbons at several line speeds. Quality assessment procedures included acid digestion, photomicroscopy, and differential scanning calorimetry. Nearly void-free ribbon with minimal thickness and width variation was produced. Depending on processing conditions, between 0 and 13 percent of the phenylethynyl reactions were completed based on the advancement of the glass transition temp. Scanning electron micrographs of fractured ribbon samples demonstrated that high line speeds tend to produce ribbon with poor fiber/matrix adhesion. Material fabricated at slow speed retained substantial melt flow, exhibited a large weld/peel strength, and would be suitable for ATP. .