Download or read book The Formation and Characterization of Biaxially and Uniaxially Oriented Poly p Phenylene Terephthalamide Films from Liquid Crystalline Solutions written by John Edmond Flood and published by . This book was released on 1982 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Process for the Formation of Biaxially Oriented Films of Poly p Phenylene Terephthalamide PPD T from Liquid Crystalline Solutions written by John E. Flood and published by . This book was released on 1981 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new process for making equal biaxially oriented films from liquid crystalline solutions of poly (p-phenylene terephthalamide) (PPD-T) is described. The process involves extruding solutions of PPD-T/H2SO4 through an annular die and over an oil coated mandrel into a coagulation bath. The films were studied using wide angle X-ray diffraction (WAXS) and scanning electron microscopy (SEM). Tensile stress-strain properties were obtained on samples cut at various directions in the plane of the film. Biaxially oriented films were produced which possess equal properties in the various directions in the plane of the film.

Download or read book High Modulus Polymers written by Zachariades and published by CRC Press. This book was released on 2020-09-10 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reflects understanding of property enhancement through development of molecular structure. It focuses on liquid crystalline and semicrystalline polymers that provide a state of the art knowledge of the molecular organizations.

Download or read book A Kinematic Approach to the Formation and Characterization of Biaxially Oriented Poly p phenylene Terephthalamide Films written by John Edmond Flood and published by . This book was released on 1985 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fabrication of Biaxially Oriented Films Via Poly P phenylene Teraphthalamide H2SO4 Liquid Crystalline Dopes written by J. F. Fellers and published by . This book was released on 1984 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fundamental innovation arising from this research is that the state of spatial biaxial order in lyotropic Poly(p-phenylene terephthalamide)(PPTA/H2SO4 liquid crystal solutions is strongly controlled by an externally imposed stress field. Also the orientation only relaxes slowly after the stresses are released. This enables processes to b devised that develop biaxial stress on a flowing liquid crystal to cause high levels of molecular orientation. Since the character of the stress, i.e., the magnitude and direction of the sigma ij components, is set by the experimental conditions, then the orientation is also controllable. Thus a process has been developed which takes advantage of the rheological and phase behavior of PPTA/H2SO4 to create films ranging from uniaxial through unequal biaxial to equal biaxial orientation. This and other structural features have been documented by WAXS, pole figure analysis, microscopy and SAXS. Also mechanical property studies show that a range of strengths and moduli can be obtained including a film of equal axial orientation (fzc = 0.45, fyc = 0.50 using the White-Spruiell indices from 0.0 to 0.5 where 0.5 means perfect orientation). Property values for this film are modulus in the machine direction = 700,000 psi and transverse direction = 800,000 psi with tensile strengths in the machine direction = 25,000 psi and transverse direction = 30,000 psi.

Download or read book Masters Theses in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States and Canada written by Wade H. Shafer and published by Springer. This book was released on 1984-02-01 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series lists applicable thesis titles published in the United States and Canada. Volume 40 covers thesis year 1995. All back volumes are still available.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1984 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Technical Conference and Exhibition of the Society of Plastics Engineers written by Society of Plastics Engineers. Technical Conference and published by . This book was released on 1981 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Papers Presented at the Meeting written by American Chemical Society. Division of Polymer Chemistry and published by . This book was released on 1980 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1982 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Characterization of Impact Modified Biaxially Oriented Poly vinyl Chloride Films written by Jeffery E. Brann and published by . This book was released on 1985 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index written by and published by . This book was released on 1984 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biaxially Oriented Poly p phenylenesulfide Film written by S. Utsumi and published by . This book was released on 1988 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Study and Comparison of Polymer Films Formed from Isotropic and Liquid Crystalline Solutions written by Hassan Bodaghi and published by . This book was released on 1984 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1984 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt: