Zobrazeno 1 - 10
of 12
pro vyhledávání: '"James J. Weeks"'
Autor:
Peter K, Sullivan, James J, Weeks
Publikováno v:
J Res Natl Bur Stand A Phys Chem
The diffraction of x-rays by the crystalline n-paraffins, C(36)H(74), C(44)H(90), and C(94)H(190), was examined at small angles – below seven degrees 2θ – as a function of temperature. The Bragg maxima (00l) that occur at these angles result fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::9268fefb43460739dccab7750cde2b67
https://pubmed.ncbi.nlm.nih.gov/32523178
https://pubmed.ncbi.nlm.nih.gov/32523178
Autor:
Norman Bekkedahl, James J. Weeks
Publikováno v:
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry. (2)
An adiabatic copper calorimeter was used to determine the heats of vulcanization of pale crepe natural rubber with sulfur for mixtures varying in composition from 0 to 32 per cent added sulfur. The side reaction that produces hydrogen sulfide was avo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43515c7cfdc372fdaae725eb5fa42a3c
https://pubmed.ncbi.nlm.nih.gov/31929627
https://pubmed.ncbi.nlm.nih.gov/31929627
Autor:
James J. Weeks
Publikováno v:
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
The melting temperature of linear polyethylene has been obtained as a function of the time and temperature of crystallization. Recrystallization was minimized by a special melting procedure. By interpreting the melting points as characteristic of a g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4aab713e83ba8ed4afa8e84ff7868e4e
https://pubmed.ncbi.nlm.nih.gov/31580592
https://pubmed.ncbi.nlm.nih.gov/31580592
Publikováno v:
Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry
The rate of isothermal bulk crystallization of poly(chlorotrifluoroethylene), Tm =221° C, was measured from 170° to 200° C. The intrinsic bulk crystallization, which accurately followed an n = 2 law, was shown to be a result of the injection of pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a2bd2e91a86354e171db0fc27ef27ba
https://pubmed.ncbi.nlm.nih.gov/31216143
https://pubmed.ncbi.nlm.nih.gov/31216143
Autor:
Shu-Sing Chang, James J. Weeks
Publikováno v:
Journal of Research of the National Institute of Standards and Technology
Heat capacities and thermodynamic properties of a number of poly(chlorotrifluoToethylene) samples subjected to various thermal treatments, to achieve crystallinities ranging from approximately 10 to 90%, have been studied from 2.5 to 370 K by automat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a95ccbc20fc1146b101d2cc453185228
https://doi.org/10.6028/jres.097.014
https://doi.org/10.6028/jres.097.014
Autor:
John D. Hoffman, James J. Weeks
Publikováno v:
Journal of Polymer Science. 28:472-475
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a483e03196f0ee288b28759f322a245d
https://doi.org/10.1002/pol.1958.1202811740
https://doi.org/10.1002/pol.1958.1202811740
Autor:
John D. Hoffman, James J. Weeks
Publikováno v:
The Journal of Chemical Physics. 37:1723-1741
(I) The requirements for making a critical test of whether two‐ or three‐dimensional surface nucleation controls the radial growth of lamellar spherulites in bulk are discussed. Radial‐growth‐rate data were obtained on spherulites of polychlo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c5370bbdfece0803b8dd24f1692ff69
https://doi.org/10.1063/1.1733363
https://doi.org/10.1063/1.1733363
Autor:
John D. Hoffman, James J. Weeks
Publikováno v:
The Journal of Chemical Physics. 42:4301-4302
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0bb610d83e482af0064462d053d022e2
https://doi.org/10.1063/1.1695935
https://doi.org/10.1063/1.1695935
Autor:
Peter K. Sullivan, James J. Weeks
Publikováno v:
Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry. :203
The diffraction of x-rays by the crystalline n-paraffins, C36H74, C44H90, and C94H190, was examined at small angles - below seven degrees 2θ - as a function of temperature. The Bragg maxima (00l) that occur at these angles result from a lamellar rep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80fe1f2b1fb34d3f0b6cfb9d8b5d0ea3
https://doi.org/10.6028/jres.074a.015
https://doi.org/10.6028/jres.074a.015
Autor:
James J. Weeks, John D. Hoffman
Publikováno v:
Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry. :13
A new method of estimating the equilibrium melting temperature, Tm, of a polymer is described, and applied to polychlorotrifluoroethylene (PCTFE). Experimentally determined values of the so-called observed melting point, !F^(obs), are plotted as a fu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e41c107e92c7987a82b16038942b4aa
https://doi.org/10.6028/jres.066a.003
https://doi.org/10.6028/jres.066a.003