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About 10,000 papers for “Crystallinity”

Crystallinity

G. M. Swallowe · Polymer science and technology/Polymer science and technology series · 1999

Cited by 0

Crystallinity

National Cancer Institute · Definitions · 2020

Ope n Pe e r v ie w on Qe ios

Cited by 0Open access

Crystallinity. Haemoglobin

Charles Tanford, Jacqueline Reynolds · 1991

Abstract Crystals of calcite, quartz, and other minerals are among the delights of nature—fascinating to all observers since the beginning of time. And crystals have been studied by scientists since the earliest days, recording geometrical shapes, angles of inclination and the like with such enthusiasm that by 1911 the Encyclopaedia Britannica employed over 100 drawings to illustrate the different known crystal systems and symmetries for its article on ‘crystallography’

Cited by 0

Polycarbonate Crystallinity

M. F. Garbauskas · 1999

Bisphenol A polycarbonate (BPA-PC) [1] is an engineering thermoplastic that has many uses in building and construction, automotive, and consumer products. The material is usually extruded or injection-molded and, under these conditions, is totally amorphous. The rigidity of the polycarbonate chain, which results in a glass transition temperature within 1 00°C of the melting point, does not allow crystalline material to nucleate and grow as it cools from the melt. However, poly carbonate can be prepared under conditions that produce crystalline material. The preparation of this material and its properties is the subject of this chapter.II. CRYSTAL STRUCTURE

Cited by 0

Liquid Crystallinity

Thomas Andrew Waigh · 2014

Liquid crystals are an intermediate state of matter between a liquid and a solid. They are characterised by orientational ordering of the molecules, while they maintain an ability to flow. There are a wide range of biological molecules that form liquid-crystalline phases. These include lipids, nucleic acids, proteins, carbohydrates and glycoproteins. To detect liquid-crystalline phase transitions a wide range of experimental techniques can be used. These include differential scanning calorimetry to study the latent heat absorbed, polarising microscopy to view the strength and variety of defect textures, X-ray and neutron scattering to measure orientational and lattice order parameters, and atomic force microscopy and ellipsometry to measure the thickness of the terraces on surfaces. Defects are an important facet of the structure of both solid and liquid-crystalline biological materials. There are two distinct categories of line defects: dislocation line defects and disclination line defects.

Cited by 0Open access

Liquid Crystallinity

Tom A. Waigh · 2007

This chapter contains sections titled: The Basics Liquid–Nematic–Smectic Transitions Defects More Exotic Possibilities for Liquid Crystalline Phases Further Reading Tutorial Questions

Cited by 1

Enhancing membrane crystallinity

Membrane Technology · 1996

Conductance measurements of 25°C are reported for dilute solutions of methanesulphonic, sulphuric, nitric, perchloric and trifluoromethanesulphonic acids in anhydrous DMSO. The results are analysed in terms of the Fuoss—Hsia conductance equation. The association constants decrease in the above order, indeed perchloric and trifluoromethanesulphonic acids can be treated as completely dissociated in dilute solution in DMSO. A reliable value for λ∞(H+) in DMSO is also reported.

Cited by 0

Calculated crystallinity and uncertainty for powder mixtures with known crystallinity percentages.

Arash Yazdani (9010151), Günther W. H. Höhne (9010154), Scott T. Misture (2139913) et al. · Figshare · 2020

<p>The values following the average crystallinity in the last column of <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0234774#pone.0234774.t001" target="_blank">Table 1</a> include the standard deviation. The errors in the initial crystallinity in this table are uncertainty values that include the standard deviation obtained from three independent measurements as well as errors originating from multiple sources explained in the manuscript.</p>

Cited by 0Open access

Crystallinity from thermal measurements

Malcolm Dole · Journal of Polymer Science Part C Polymer Symposia · 1967

Abstract The problems involved in the determination of the fraction of crystallinity by thermal measurements are discussed. It is shown that in certain cases specific heat measurements themselves can be used to estimate the fraction of crystallinity. In the case of specific heat data on single crystals of polyethylene obtained by Karasz and Hamblin the specific heats are a linear function of the reciprocal fold length and can be extrapolated to infinite fold length to obtain the specific heat of 100% crystalline polyethylene. This extrapolated value is compared with other estimates and is used to calculate the fraction of crystallinity of polyethylene of different forms. Within the experimental uncertainties it would appear that estimates of the crystallinity from calorimetric, x‐ray, dilatometric, and infrared measurements are all in substantial agreement.

Cited by 45

Crystallinity of poly(tetrafluoroethylene)

R. Ścigała, A. Włochowicz · Acta Polymerica · 1989

Abstract A procedure for the estimation of the crystallinity of poly(tetrafluoroethylene) is proposed. For this purpose the X‐ray intensity distribution curve has been described by the Pearson VII function. The solution is presented in full and simplified forms. The theoretical approach is confirmed by experimental data.

Cited by 18