Zobrazeno 1 - 10
of 76
pro vyhledávání: '"D.M. Sadler"'
Publikováno v:
Polymer. 32:387-392
6,6-Nylon has been polymerized using d 8 -adipic acid. For a regular fold surface, the interior of the d 8 -6,6-nylon crystals then involves a regular alternation of regions with high and low scattering length density. Neutron diffraction data obtain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d4e965dba215fa28aec3df39f9ad3ea
https://doi.org/10.1016/0032-3861(91)90439-p
https://doi.org/10.1016/0032-3861(91)90439-p
Publikováno v:
Polymer. 31:195-201
Previous neutron scattering investigations carried out on isotactic polystyrene single crystals grown at 130°C from dilute solutions have revealed a sheet-like conformation and hence very regular chain folding. Here we report the same type of experi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4c66416c2387523d51c5b2d13c7ba67
https://doi.org/10.1016/0032-3861(90)90105-8
https://doi.org/10.1016/0032-3861(90)90105-8
Autor:
Peter J. Barham, D.M. Sadler
Publikováno v:
Polymer. 31:46-50
Results of neutron scattering experiments performed on polyethylene fibres drawn beyond the neck are reported. Data are reported for fibres with total draw ratios up to ∼40 and tensile moduli up to ∼100 GPa. It is shown that on post-neck drawing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb250b71807313fd5e85a10c73c5e6c1
https://doi.org/10.1016/0032-3861(90)90347-2
https://doi.org/10.1016/0032-3861(90)90347-2
Autor:
Peter J. Barham, D.M. Sadler
Publikováno v:
Polymer. 31:36-42
Results of neutron scattering experiments performed on fibres of polyethylene drawn through a neck from melt-crystallized sheets are reported. It is shown, from the appearance of an isotopic segregation signal, that at drawing temperatures above ∼7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7526972520baedfb0e812845950d7c98
https://doi.org/10.1016/0032-3861(90)90345-y
https://doi.org/10.1016/0032-3861(90)90345-y
Publikováno v:
Chemistry and Physics of Lipids. 52:41-48
A method of deriving by neutron scattering thicknesses of lamellae in suspensions has been applied to single-walled vesicles of dimyristoyl phosphatidylcholine. The contrast variation method, based on data obtained for a range of isotope mixtures, ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c7a91a7b14e4cdeefa2a520fde2a2ac
https://doi.org/10.1016/0009-3084(90)90005-c
https://doi.org/10.1016/0009-3084(90)90005-c
Autor:
D.M. Sadler, Peter J. Barham
Publikováno v:
Polymer. 32:393-395
The changes in chain trajectories occurring during the melting of polyethylene single crystal mats have been studied by using neutron scattering techniques. It is shown that molecules change from a regular superfolded sheet structure into a random co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac837a6203732a20b92f9c4761de5e9c
https://doi.org/10.1016/0032-3861(91)90440-t
https://doi.org/10.1016/0032-3861(91)90440-t
Autor:
Peter J. Barham, D.M. Sadler
Publikováno v:
Polymer. 31:43-45
Results of neutron scattering experiments on polyethylene fibres prepared by drawing oriented mats of isolated single crystals through a neck are reported. It is shown (from the appearance of an isotopic segregation signal) that, as the temperature o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca6b41574efc482b9c3704f79c92a709
https://doi.org/10.1016/0032-3861(90)90346-z
https://doi.org/10.1016/0032-3861(90)90346-z
Autor:
D.M. Sadler, D.L. Worcester
Publikováno v:
Journal of Molecular Biology. 159:467-482
The structures of photosynthetic membranes from chloroplasts of Euglena gracilis and spinach were studied by neutron diffraction from oriented specimens. Orientation of the membranes was achieved in two different ways. (1) Centrifugation and controll
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::486bcbeecd929a1017fa176afa6156d9
https://doi.org/10.1016/0022-2836(82)90295-9
https://doi.org/10.1016/0022-2836(82)90295-9
Autor:
D.M. Sadler, S.J. Spells
Publikováno v:
Polymer. 25:1219-1226
Neutron scattering measurements on polyethylene slowly crystallized from the melt give similar results, in the q range 0.1-0.4 A −1 , to melt-quenched material. This indicates a similar type of folding, at least as concerns structure on a scale of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a45bf876d1ed90666f7a8f784ad264c8
https://doi.org/10.1016/0032-3861(84)90367-7
https://doi.org/10.1016/0032-3861(84)90367-7
Autor:
D.M. Sadler
Publikováno v:
Polymer. 24:1401-1409
It is proposed that the growth faces of lamellar polymer crystals can have an equilibrium roughness (or crenellation). This can explain why some polymer crystals show no evidence of faceting. Support for this idea comes from the extensive theoretical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a780620efdcdb0191d1c3c2a2b0f67f6
https://doi.org/10.1016/0032-3861(83)90220-3
https://doi.org/10.1016/0032-3861(83)90220-3