The crystal structure of optically active microbial poly(D(-)-beta-hydroxybutyrate) has been refined with the Rietveld whole-fitting method applied to powder X-ray diffraction data. This natually occurring polymer gives rise to a very crystalline phase and therefore to very detailed and resolved powder profiles. Reliability of the refinement is discussed in relation to results obtained from previous studies on oriented-fiber diffraction patterns. The conclusion is that well-detailed powder profile data are highly discriminatory toward structural models not very dissimilar from each other. This result is considered an encouraging step toward a more general assessment of the accuracy of structural parameters obtained from best fitting of powd...
Techniques for structure determination of organic materials from powder X-ray diffraction data are ...
X-ray methods are very useful tools for the structural characterization of polymer systems. Consider...
361-366X-ray diffraction (XRD) studies are very useful for distinguishing crystalline and non-crys...
The crystal structure of optically active microbial poly(D(-)-beta-hydroxybutyrate) has been refined...
Provided the structure is known, a method has been developed using the Rietveld technique on X-ray p...
A new method for determining the crystallinity fraction of semi-crystalline polymers from X-ray powd...
A comparative study is carried out on the structure of the alpha-form of polypivalolactone obtained ...
The Rietveld method is a well known powder-pattem-fitting method which consists in adjusting the com...
Powder X-ray diffraction patterns were recorded of the orthorhombic form of poly(glycolic acid) and ...
The full-profile refinement of X-ray diffraction patterns was used to investigate two poly(thiodiet...
Provides the tools needed to master and apply the fundamentals of polymer crystallography. Using c...
In the present work, we present a methodology to analyze diffraction images of polymers to obtain cr...
A sample of commercial semicrystalline polyethylene (PE), characterized by a M-w of 300,000 and an e...
The crystal structure of the gamma-phase of polypivalolactone (gamma-PPVL) has been determined from ...
In a previous paper [Dupont, Jonas & Legras (1997). J. Appl. Cryst. 30, 921-931], a variant of the R...
Techniques for structure determination of organic materials from powder X-ray diffraction data are ...
X-ray methods are very useful tools for the structural characterization of polymer systems. Consider...
361-366X-ray diffraction (XRD) studies are very useful for distinguishing crystalline and non-crys...
The crystal structure of optically active microbial poly(D(-)-beta-hydroxybutyrate) has been refined...
Provided the structure is known, a method has been developed using the Rietveld technique on X-ray p...
A new method for determining the crystallinity fraction of semi-crystalline polymers from X-ray powd...
A comparative study is carried out on the structure of the alpha-form of polypivalolactone obtained ...
The Rietveld method is a well known powder-pattem-fitting method which consists in adjusting the com...
Powder X-ray diffraction patterns were recorded of the orthorhombic form of poly(glycolic acid) and ...
The full-profile refinement of X-ray diffraction patterns was used to investigate two poly(thiodiet...
Provides the tools needed to master and apply the fundamentals of polymer crystallography. Using c...
In the present work, we present a methodology to analyze diffraction images of polymers to obtain cr...
A sample of commercial semicrystalline polyethylene (PE), characterized by a M-w of 300,000 and an e...
The crystal structure of the gamma-phase of polypivalolactone (gamma-PPVL) has been determined from ...
In a previous paper [Dupont, Jonas & Legras (1997). J. Appl. Cryst. 30, 921-931], a variant of the R...
Techniques for structure determination of organic materials from powder X-ray diffraction data are ...
X-ray methods are very useful tools for the structural characterization of polymer systems. Consider...
361-366X-ray diffraction (XRD) studies are very useful for distinguishing crystalline and non-crys...