Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Norman J. Johnston"'
Publikováno v:
High Performance Polymers. 14:209-223
As part of an effort to develop a low-volatile, essentially dry, carbon fiber tape from a phenylethynyl-terminated imide for use in heated head automated tow placement, a 70:30 blend of LaRCTM PETI-5 and LaRCTM PETI-IAX was prepared in N-methyl-2-pyr
Publikováno v:
High Performance Polymers. 7:105-124
LARCTM-IA (Langley Research Center-Improved Adhesive) aromatic polyimide, based on oxydiphthalic anhydride and 3.4'-oxydianiline, was evaluated as a matrix for high-performance composites. Six poly(amide acid)solutions in N-methylpyrrolidone (NMP), e
Publikováno v:
Polymer. 35:4956-4969
LARCTM-ITPI, an isomeric variation of the better known LARCTM-TPI and based on 4,4′-isophthaloyldiphthalic anhydride and 1,3-phenylenediamine, was evaluated as a matrix for high-performance composites. Five 30% poly(amide acid) solutions in N-methy
Various configurations of Edge Delamination Tension (EDT) test specimens, of both brittle (T300/5208) and toughened-matrix (T300/BP907) graphite reinforced composite laminates, were manufactured and tested. The mixed-mode interlaminar fracture toughn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f885857901e3c65d998bd19b4de3afe
https://doi.org/10.1520/stp24379s
https://doi.org/10.1520/stp24379s
Edge delamination tension and double cantilever beam tests were used to characterize the interlaminar fracture toughness of continuous graphite-fiber composites made from experimental thermoplastic polyimides and a model thermoplastic. Residual therm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::133c6f8787bd0801ff7ac5c5a6c25671
https://doi.org/10.1520/stp24606s
https://doi.org/10.1520/stp24606s
A number of thermoset, toughened thermoset, and thermoplastic resin matrix systems were characterized for Mode I critical strain energy release rates, and their composites were tested for interlaminar critical strain energy release rates using the do
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::832a28f203f075e7cdde99b130b2d4d7
https://doi.org/10.1520/stp24372s
https://doi.org/10.1520/stp24372s
Autor:
Norman J. Johnston
Publikováno v:
Journal of the Society of Architectural Historians. 35:51-54
WHEN Walter Creese in his Search for Environment' mentioned Beaux Arts Village east of Seattle, Washington, he identified one of the more remote responses to the Arts and Crafts Movement. For in ambition if not achievement, the colonizers of the Vill
Autor:
Norman J. Johnston, Anne K. St. Clair
Publikováno v:
Journal of Polymer Science: Polymer Chemistry Edition. 15:3009-3021
Three polyphenylquinoxalines were prepared by the one-step solution cyclopolycondensation of 3,3′,4,4′-tetraaminobenzophenone with three novel bisbenzils containing oxyphenylene groups. High molecular weight polymers were obtained that exhibited
Autor:
Norman J. Johnston
Publikováno v:
Journal of the American Institute of Planners. 31:198-209
As a preliminary gesture anticipating the ceremonials of the Fiftieth Anniversary of the founding of the American Institute of Planners, this paper reviews some of the historical forces, events, and personalities preceding that moment of organization
Autor:
Norman J. Johnston
Publikováno v:
Journal of Near Eastern Studies. 30:159-176