Search results

From Self-sufficiency
Jump to: navigation, search
  • ...and sulfates can help to reduce corrosive action and deterioration of the structure.<ref>{{Cite web | title= High Performance Cement for High Strength and Extr | title = Hydration, structure, and properties of blast furnace slag cements, mortars, and concrete
    8 KB (1,255 words) - 10:08, 20 September 2010
  • ...ieces (scintillation) and deliver it to the eye (brilliance). In its rough crystalline form, a diamond will do none of these things, it requires proper fashioning This difference in color is based on the atomic structure of the stone. Although the different stones formally have the same chemical
    24 KB (3,690 words) - 10:08, 20 September 2010
  • ...n= New York |language= English |isbn= 0-8247-9468-0}}</ref> are a group of crystalline polar [[polymers]] that are also [[ferroelectric]], meaning that they maint [[image:Polyvinylidene_fluoride.png|right|thumb|Figure 1: Structure of Poly(vinylidene fluoride)]]
    25 KB (3,633 words) - 10:09, 20 September 2010
  • ...ample of lyotropic LCPs is the commercial aramid known as Kevlar. Chemical structure of this aramid consists of linearly substituted aromatic rings linked by am ..., liquid-crystal polymers are capable of forming regions of highly ordered structure while in the liquid phase. However, the degree of order is somewhat less th
    4 KB (613 words) - 10:09, 20 September 2010
  • ...s controlled by several parameters such as the number of nucleation sites, structure of the polymer molecules, cooling rate, etc. Depending on those parameters, ...ertain ''orderly configuration'': they align themselves in plates called ''crystalline lamellae''.<ref name=sp/>
    9 KB (1,348 words) - 10:09, 20 September 2010
  • [[Image:polyanhydride structure.jpg|thumb|500px|right|The structure of a polyanhydride molecule with ''n'' repeating units.]] ...ched chains. This class of [[polymers]] is characterized by a crystalline structure, melting temperature range of 50–90&nbsp;°C, and solubility in chlorinat
    10 KB (1,280 words) - 10:09, 20 September 2010
  • [[File:PADC.svg|thumb|Structure]] ...er to form [[cross-link]]s; thus, it is a [[thermoset]] resin. The monomer structure is
    5 KB (712 words) - 10:09, 20 September 2010
  • ...ity#Isotactic_polymers|isotactic]], and [[Crystallization of polymers|semi-crystalline]] polymer. PB-1 combines typical characteristics of conventional [[polyolef ...f the supported catalysts are high productivity and a high fraction of the crystalline isotactic polymer they produce at 70–80 °C under standard polymerization
    12 KB (1,699 words) - 10:09, 20 September 2010
  • ...e loss of physical properties as the polymer is still held together by the crystalline regions. Water penetrates the device leading to metabolization of the fragm An example of the structure of some of the types of polymer degradation can be viewed in Figure one in
    8 KB (1,069 words) - 10:09, 20 September 2010
  • Meyers, M.A., et al., "Biological Materials: Structure & Mechanical Properties", Progress in Materials Science, Vol. 53, p. 1 (200 ...epetitive units called [[monomer]]s. Biopolymers often have a well defined structure, though this is not a defining characteristic (example:ligno-cellulose):
    68 KB (9,959 words) - 10:10, 20 September 2010
  • ...[[conjugated system|conjugated]] [[diene]] [[hydrocarbon]]; the [[chemical structure]] is shown as a [[reactant]] in the diagram below. A hydrocarbon diene [[mo ...in the polymer chain, preventing polymer chains from lining up and forming crystalline regions and resulting in larger regions of amorphous polymer. It has been f
    8 KB (1,174 words) - 10:10, 20 September 2010
  • 0.946 g/cm<sup>3</sup>, crystalline Propylene was first polymerized to a crystalline isotactic polymer by [[Giulio Natta]] and his coworkers in March of 1954<re
    25 KB (3,657 words) - 10:10, 20 September 2010
  • ...the transmission electron microscope or [[TEM]] was needed to examine the structure. The butadiene matrix was stained with [[osmium tetroxide]] to provide cont ...ion of the SBS block polymers, especially where one of the block is highly crystalline. One exception to the rule of incompatibility is the material [[Noryl]], wh
    11 KB (1,609 words) - 10:10, 20 September 2010
  • ==Correlation of chemical structure and electrical conductivity== ...1950s, when Bernanose and coworkers first produced electroluminescence in crystalline thin films of acridine orange and quinacrine. In 1960, researchers at Dow C
    22 KB (3,022 words) - 10:10, 20 September 2010
  • ...</ref> [[amorphous]]: 1.370 g/cm<sup>3</sup>,<ref name="van der Vegt" /> [[crystalline]]: 1.455 g/cm<sup>3</sup><ref name="van der Vegt" /> ...que and white (particle size up to a few microns) depending on its crystal structure and particle size. Its monomer (bis-β-hydroxyterephthalate) can be synthes
    43 KB (6,272 words) - 10:11, 20 September 2010
  • ...characterization of polymers, a correct understanding of polymer molecular structure did not emerge until the 1920s. Before then, scientists believed that polym ...n|modified further]] following translation in order to provide appropriate structure and functioning.
    45 KB (6,501 words) - 10:11, 20 September 2010
  • ==Structure and properties== ...f name="Aulin2009"/> The degree of crystallinity and the cellulose crystal structure of nanocellulose were also studied at the same time. The results clearly sh
    25 KB (3,447 words) - 10:11, 20 September 2010
  • ...line nor amorphous and are classified as semicrystalline. Examples of semi-crystalline polymers are linear [[polyethylene]] (PE), [[polytetrafluoroethylene]] (PTF [[Image:Isotactic polypropylene.svg|thumb|The structure of isotactic polypropylene.]]
    18 KB (2,533 words) - 10:11, 20 September 2010
  • ..., such as excluded volume interactions or electrostatic forces, govern the structure and behavior of colloidal suspensions. For example, the same techniques use ...sub>2</sub>).<ref>{{cite journal|author = Sanders, J.V.|year =1964|title = Structure of Opal|journal = Nature |volume=204|page =1151|doi=10.1038/204990a0|last2
    27 KB (3,735 words) - 10:13, 20 September 2010
  • ...f most metals is due to the tightly packed crystal lattice of the metallic structure. The strength of metallic bonds for different metals reaches a maximum arou ...culated from the [[free electron model]], which does not take the detailed structure of the ion lattice into account.
    24 KB (3,311 words) - 10:13, 20 September 2010

View (previous 20 | next 20) (20 | 50 | 100 | 250 | 500)