The SAXS investigations of PE/ABS blends

Blends of polyethylene and noncrystallizable ABS copolymer have been investigated by using small angle X-ray scattering. The relative constancy of the interlamellar spacing and the degree crystallinity as the concentration of the noncrystallizble component increased to 50 % by weight has been interpreted as the result of rejection of the latter from the interlamellar regions. The presence of ABS copolymer in the interfibrillar regions has a little effect on the supermolecular structure of polyethylene

SAXS investigations of the influence of the length of methylene chain on supermolecular structure of poly(alkylene phosphates)

The influence of the number of CH2 groups and the evennes of this number on the lamellar arrangement of macromolecules of poly(alkylene phosphates) PPhn were investigated by SAXS method. The results indicate that deviations from the ideal lamellar model for the polyphosphates with asymmetric mers (n-odd number) are generally larger and qualitatively different as compared with that for the polyphosphates with symmetric mers (n- even number). The heterogeneity of phases were measured by the ratio of the mean square electron density fluctuations calculated from the SAXS curves before and after background subtraction. It was found that the heterogeneity of the PPh8 polyphosphate is smallest. Besides, a linear relationship between the weight average long period Lw and the molecular mass of the PPhn polyphosphates was confirmed

SAXS investigations of polyethylene modified with methacrylic acid

The polyethylene/poly(methacrylic acid-co-divinylbenzene), PE/poly(MA-co-DVB), interpolymer type carboxylic membranes were studied using small-angle X-ray diffraction (SAXS) in order to deduce the effect of DVB content on their morphology. SAXS curves exhibit a maximum which indicates that the interpolymers have morphology of domain type. Using the standard theory for a two-phase system mean distance between domains and their sizes were calculated from the SAXS data. Analysis of the SAXS curves suggests a fractal behaviour of the internal surface, associated with this two-phase system. Results obtained from SAXS studies are consistent with the general model of these interpolymers revealed by microscopic investigations

Poly(ether-block-sulfonated ester) copolymers. III. Morphology and ionic aggregation in PESE

21 pags. 11 figs.Sulfonated poly(ether-ester) copolymers (PESE) based on poly(butylene terephthalate-co-butylene 5´-sulfoisophthalate sodium salt) and poly (1,4-oxytetramethylene) were estudied.Peer reviewe