Results 221 to 230 of about 34,619 (259)
Some of the next articles are maybe not open access.
Morphology of melt-crystallized syndiotactic polypropylene
Journal of Electron Microscopy, 2002A transmission electron microscopy (TEM) study was made to investigate the mechanism of isothermal crystallization from melt for syndiotactic polypropylene (sPP) with a syndiotactic pentad fraction of 0.92. The TEM morphologies of RuO4-stained and ultrathin-sectioned specimens revealed a clear assignment of lamellar crystals with different crystal ...
Jun-ichi, Harasawa +3 more
openaire +2 more sources
Template‐Directed Control of Crystal Morphologies
Macromolecular Bioscience, 2007AbstractBiominerals are characterised by unique morphologies, and it is a long‐term synthetic goal to reproduce these synthetically. We here apply a range of templating routes to investigate whether a fascinating category of biominerals, the single crystals with complex forms, can be produced using simple synthetic methods.
Meldrum, Fiona C., Ludwigs, Sabine
openaire +3 more sources
Screening-controlled morphologies of Yukawa crystals
The Journal of Chemical Physics, 2010Asymptotic expressions for the energies of Yukawa crystals, valid at the Coulomb and hard-sphere (i.e., the weak-screening and strong-screening) limits, are derived. Careful analysis of these limits elucidates the origin of the observed structural transitions that interconnect distinct particle configurations.
Jerzy, Cioslowski, Ewa, Grzebielucha
openaire +2 more sources
Crystallization and Morphology of Rubber
Rubber Chemistry and Technology, 1995Abstract Naturally occurring materials like rubber predate the development of science and engineering as we know it today. Historically, rubber and more generally elastomers, known as a class of high polymers, are versatile and useful materials. Rubber is still an elastomer of choice for many engineering applications.
openaire +1 more source
Morphology and Nanomechanics of Conducting Plastic Crystals
ChemPhysChem, 2004AbstractWe present a temperature‐controlled scanning probe microscopy characterisation of morphology and mechanical behaviour of conducting N,N′‐cyclized pyrazolium salts. These salts are plastic crystals belonging to the pyrazolium trifluoromethanesulfonimide family.
Maritza, Volel +3 more
openaire +2 more sources
Insights into the crystal size and morphology of photocatalysts
Journal of Colloid and Interface Science, 2019Identification of the role of the specific surface area and surface structure as a key factor for photocatalytic performance remains a controversial topic. In this work, three types of N-doped anatase TiO2 with different morphologies are newly synthesized by changing the addition order for the reagents.
Ke Chen +5 more
openaire +2 more sources
Polymer, 1994
Abstract Linear crystal growth rates of two narrow molecular weight fractions of syndiotactic polypropylene having the same syndiotacticity have been measured using polarized light microscopy over a temperature range of > 20°C. It has been found that a regime III to regime II transition at a supercooling of ∼ 50°C exists.
Jonahira Rodriguez-Arnold +8 more
openaire +1 more source
Abstract Linear crystal growth rates of two narrow molecular weight fractions of syndiotactic polypropylene having the same syndiotacticity have been measured using polarized light microscopy over a temperature range of > 20°C. It has been found that a regime III to regime II transition at a supercooling of ∼ 50°C exists.
Jonahira Rodriguez-Arnold +8 more
openaire +1 more source
Crystal morphology, optical properties of crystals and crystal mounting
2006The first section of the chapter, Section 5.1.1, begins with a general description of crystal morphology and how the handedness of biological molecules limits the space groups they can crystallize in. Description of the proportion of solvent in macromolecular crystals, introduced by Matthews in 1968, is also included.
H. L. Carrell, J. P. Glusker
openaire +1 more source
Morphology and Crystallization in Polymers
1993This paper is an attempt to provide a simple introduction to polymer morphology and crystallisation. The essential and important aspects will be underlined by using selected examples. The paper starts with a preliminary survey on the characteristics of the solid state of polymer.
S.Cimmino, E.Di Pace, C.Silvestre
openaire +1 more source
2019
Defining planes in a crystal is necessary to describe morphology and for visualisation and description of a diffraction pattern. Planes in crystals are defined relative to the unit cell using a set of three integers called Miller indices. Since a crystal is periodic by translation, Miller indices actually describe sets of planes through the crystal ...
openaire +1 more source
Defining planes in a crystal is necessary to describe morphology and for visualisation and description of a diffraction pattern. Planes in crystals are defined relative to the unit cell using a set of three integers called Miller indices. Since a crystal is periodic by translation, Miller indices actually describe sets of planes through the crystal ...
openaire +1 more source