Zobrazeno 1 - 10
of 30
pro vyhledávání: '"D. R. Wiff"'
Autor:
D. R. Wiff, Matatiahu Gehatia
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 43:219-234
Inferring the Molecular Weight Distribution (MWD) of a polymer in solution from ultracentrifuge sedimentation equilibrium data has been a problem of major concern during the past decades. Recently, it has been shown that this problem is of itself mat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97e9e9a2e6c197e26989e21afa613493
https://doi.org/10.1002/polc.5070430119
https://doi.org/10.1002/polc.5070430119
Publikováno v:
Materials Science in Semiconductor Processing. 8:497-501
Quantum mechanical CASTEP software calculations were performed using nickel and rhenium atom deposition onto cleaved surfaces (active, hydrogenated, and oxygenated). These calculations were performed without metal atoms and with metal atoms at select
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb8d4e4b80bcaf7f2b3c76999623964d
https://doi.org/10.1016/j.mssp.2004.07.002
https://doi.org/10.1016/j.mssp.2004.07.002
Autor:
J. F. Roach, D. R. Wiff
Publikováno v:
Polymer Engineering & Science. 41:2200-2205
A new procedure for measuring the peermeability of a high pressure gas (10.34 MPa) through a polymeric material has been developed. The procedure employs a vacuum system on the low-pressure side of the material. Although it gives a pressure differenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa5af019c63a74726964dd07ae89bcc9
https://doi.org/10.1002/pen.10915
https://doi.org/10.1002/pen.10915
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 32:2555-2565
The present invention provides a composite material comprised of a matrix polymer and a reinforcing polymer, called a rigid rod polymer, which is well dispersed in the matrix polymer. This material displays enhanced mechanical properties. The matrix
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c84389dcf98b49642df1a12da491d29d
https://doi.org/10.1002/polb.1994.090321601
https://doi.org/10.1002/polb.1994.090321601
Autor:
D. R. Wiff, G. M. Lenke
Publikováno v:
MRS Proceedings. 305
The basic concepts of in-situ molecular composite formation are presented with a polyazomethine/nylon 6 system as an example. All the encouraging attributes of molecular reinforcement - increased Tg, solvent resistance and mechanical properties were
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7dd2edd9d76db61c18bc25980b35718a
https://doi.org/10.1557/proc-305-161
https://doi.org/10.1557/proc-305-161
Autor:
D. R. Wiff, Matatiahu T. Gehatia
Publikováno v:
Biophysical Chemistry. 5:199-206
The ill-posed problem of inferring a molecular weight distribution from ultracentrifuge equilibrium sedimentation data at a single rotor velocity has been circumvented by application of a regularization and quadratic programming technique, This has b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cce889a0cddcd3cd7e3516b89b7a4773
https://doi.org/10.1016/0301-4622(76)80035-x
https://doi.org/10.1016/0301-4622(76)80035-x
Publikováno v:
Journal of Polymer Science: Polymer Physics Edition. 23:1165-1176
A reliable semiempirical method for predicting glass transition tempertures of linear polymers, random copolymers, and selected crosslinked networks from knowledge of only their chemical structure is presented. For cases in which new moieties not in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c90c7798eb5254c10aef83c2dc20eb69
https://doi.org/10.1002/pol.1985.180230608
https://doi.org/10.1002/pol.1985.180230608
Autor:
D. R. Wiff
Publikováno v:
Journal of Rheology. 22:589-597
The Regularization‐Quadratic Programming (RQP) method is used to circumvent the inherent ill‐posedness of integral equations of the first kind found in the theory of linear viscoelasticity. The ability of this method to detect sharp “cutoffs”
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2d2af52d4b49c60d37835b08a1131dc
https://doi.org/10.1122/1.549491
https://doi.org/10.1122/1.549491
Publikováno v:
Macromolecules. 14:935-939
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79bfe280b297e9b8eb131376d069f243
https://doi.org/10.1021/ma50005a009
https://doi.org/10.1021/ma50005a009
Publikováno v:
Journal of Polymer Science: Polymer Physics Edition. 13:275-284
Two different polybenzimidazole (PBI) samples have been investigated in order to correlate the differences in molecular weight distribution (MWD) with changes in the elastic modulus and strength of undrawn and drawn fibers. It has been found that wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6507389c9748500ba095172a70db051
https://doi.org/10.1002/pol.1975.180130205
https://doi.org/10.1002/pol.1975.180130205