Download PDF by Dr. Louis A. Pilato, Michael J. Michno (auth.): Advanced Composite Materials

By Dr. Louis A. Pilato, Michael J. Michno (auth.)

ISBN-10: 3642081878

ISBN-13: 9783642081873

ISBN-10: 3662353563

ISBN-13: 9783662353561

Advanced composite fabrics or excessive functionality polymer composites are an strange classification of fabrics that own a mix of excessive energy and modulus and are considerably greater to structural metals and alloys on an equivalent weight foundation. The e-book presents an outline of the foremost elements which are thought of within the layout of a composite, of floor chemistry, of analyses/testing, of structure/property relationships with emphasis on compressive power and harm tolerance. Newly rising assessments, relatively open gap compression exams are anticipated to supply higher coverage of composite functionality. This e-book is an "up-to-date" therapy of innovative parts of composite know-how with literature reviewed until eventually lately and comprises thermoplastic prepregs/composites and significant software areas.

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Extra resources for Advanced Composite Materials

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Variations of PMR-15 Extension ofthe P13N and PMR-15 technology by NASA Langley researchers resulted in relatively solvent free systems, LARC-160 and LARC-13. The former was a melt processable oligomer from the reaction of diethyl ester of 3,3',4,4' benzophenone tetracarboxylic acid, nadic acid and a liquid eutectic amine mixture of methylene dianiline, known as Jeffamine (Eq. 6 Ar = Jeffamine). With a Mn of about 1600 gjmole, LARC 160 is a melt processable composition which processes like an epoxy resin but the thermooxidative stability of LARC-160 is lower than PMR-15 [51].

Besides use in aircraft due to FST characteristics, PF resin and modified PF resins are the resins of choice in high performance ballistic composite components that incorporate S-2 Glass or Kevlar aramid fibers. 85) to form a solid, low melting thermoplastic material, known as a novolak, or by a base catalyzed reaction of phenol with formaldehyde to form a resole resin. The amount of formaldehyde may vary from less than a molar ratio to more than 3 moles of formaldehyde to phenol (Eq. 1). 1 P Crosslinked resin ,.

22). A more stable polymer with improved thermal and oxidative stability (as compared to phenolic resin) is obtained with a T g greater than 300 oc, good retention of mechanical properties above 300 oc and a char yield of 70% at 1000 oc. The authors claim that the PT resin is comparable to PMR-15 and other related high performance thermoset systems for high temperature use above 316 oc. CNCI tertiary amine NOVOLAK- 0 '( N ";"( 0- NOVOLAK NYN 0 I NOVOLAK Equation 22 Co-reaction of cyanate esters with epoxies, BMI resins and high performance thermoplastic resins has expanded the utility of cyanate esters.

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Advanced Composite Materials by Dr. Louis A. Pilato, Michael J. Michno (auth.)


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