And polymers
Found 9 free book(s)
Friction and Wear of Polymers and Composites
ocw.mit.eduMinimization of Wear of Polymers by Plasma Treatment • Crystalline polymers: HDPE, POM • Amorphous polymers: PMMA, PC • CASING (Cross-linking by activated species of inert gases) • Helium plasma (1 torr, 13.56 MHz, 100 Watts, Room temp.) for 500 and 1000 seconds • Pin-on-disk, Normal load = 4.4 N, speed = 3.3 cm/s
PVP Polymers Brochure - | Brenntag
www.brenntag.comPVP polymers are supplied in various viscosity grades as a powder and/or aqueous solution. The full line of PVP polymers are also available for personal care applications such as film forming, emulsion stabilization and colorant dispersion. Ashland also
Understanding Rheology of Thermoplastic Polymers
www.tainstruments.compolymers’ flow behavior at temperatures above the glass transition temperature (for an amorphous material) or the melting point (for a semi-crystalline polymer). Melt viscosity is a constant at low shear rates or frequencies. The viscosity in this region is known as the zero shear, or Newtonian, viscosity ho. For low molecular weight polymers
Characterization of polymers by NMR
www.eng.uc.eduCharacterization of polymers by NMR • Analysis : •O mf onomser • Of copolymers (sequences) • Of reaction products • Of the microstructure (3 types of isomerism, including tacticity) • Of the composition of a copolymer • Of branching in polyethylene • Of relaxation mechanisms
DYNAMIC-MECHANICAL PROPERTIES OF POLYMERS
www.eng.uc.eduPOLYMERS MECHANICAL PROPERTIES OF (POLYMERIC) MATERIALS UNDER THE INFLUENCE OF DYNAMIC LOAD AND TEMPERATURE mechanical modulus as a function of load, temperature, time A project of the IUPAC Division IV (POLYMER DIVISION) transitions, relaxations. Laboratorium für Makromolekulare Chemie
Crystallinity in Polymers - University of Texas at Austin
willson.cm.utexas.eduCrystallinity in Polymers Brandon Rawlings February 12, 2009. Crystalline Structures Single Crystals Polymer Spherulites Sharmistha Datta & David J. W. Grant, Nature Reviews Drug Discovery 3, 42 -57 (January 2004) Physical State Transitions Glass Increasing Temperature Liquid Flexible Thermoplastic Gum
Flammability of Polymers - Appalachian State University
www.appstate.eduFlammability of Polymers Introduction Most plastics are carbon-based materials and will burn and give off gases and smoke when subjected to a flame. Plastics are excellent fuels but are generally classed as ordinary combustibles and fall into the same category as wood, leather and many other common materials.
Typical Engineering Properties of Polypropylene
www.ineos.comOlefins & Polymers USA, nor any of itsaffiliates assumes any liability whatsoever for the accuracy or completeness of the information contained herein. Any “Properties” and/or “Applications” listed in this document are not specifications. They are provided as information only and in no way modify, amend, enlarge, or
Polymers: Molecular Weight and its Distribution
www.chem.cmu.eduPolymers: Molecular Weight and its Distribution 1. Introduction Synthetic polymers are polydisperse to varying degrees in a variety of ways. The chains in a sample may differ in, for example, molecular weight, degree of long or short-chain branching, stereostructure or composition (either grossly, as with copolymers, or slightly, as with end group