Please use this identifier to cite or link to this item:
https://open.uns.ac.rs/handle/123456789/13282
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Budinski-Simendić, Jaroslava | en |
dc.contributor.author | Petrović Z. | en |
dc.contributor.author | Ilavský M. | en |
dc.contributor.author | Dušek K. | en |
dc.date.accessioned | 2020-03-03T14:51:45Z | - |
dc.date.available | 2020-03-03T14:51:45Z | - |
dc.date.issued | 1993-01-01 | en |
dc.identifier.issn | 00323861 | en |
dc.identifier.uri | https://open.uns.ac.rs/handle/123456789/13282 | - |
dc.description.abstract | The effect of the initial molar ratio of the reactive groups, rNCO (= [NCO]0 [OH]0=1.0 or 0.8), on the gelation of polyurethane networks based on tris(4-isocyanatophenyl)thiophosphate and poly(oxypropylene) diol, was studied. The number-average molecular weight, M ̄n, in the pre-gel state, the critical conversion at the gel point, pcNCO, and the critical ratio, rcNCO, at which gelation occurs, were measured. The decrease in 1 rcNCO with increasing dilution in xylene suggests that cyclization takes place. The experimental M ̄n values are always lower than the theoretical ones, with the latter being calculated for the ring-free case. The fraction of bonds that are lost in the cyclization process, s, calculated from the difference between the experimental and theoretical values of M ̄n, increases with conversion and has a value near the gel point of 0.04-0.06. It is demonstrated both theoretically and experimentally that the values of s calculated from the shift of the gel point conversion are not equivalent to those obtained from M ̄n, but depend on rNCO. © 1993. | en |
dc.relation.ispartof | Polymer | en |
dc.title | Effect of the ratio of reactive groups on gelation and cyclization during polyurethane network formation | en |
dc.type | Journal/Magazine Article | en |
dc.identifier.doi | 10.1016/0032-3861(93)90263-A | en |
dc.identifier.scopus | 2-s2.0-0027812979 | en |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/0027812979 | en |
dc.relation.lastpage | 5162 | en |
dc.relation.firstpage | 5157 | en |
dc.relation.issue | 24 | en |
dc.relation.volume | 34 | en |
item.grantfulltext | none | - |
item.fulltext | No Fulltext | - |
crisitem.author.orcid | https://orcid.org/0000-0002-5706-5193 | - |
Appears in Collections: | TF Publikacije/Publications |
SCOPUSTM
Citations
12
checked on May 10, 2024
Page view(s)
45
Last Week
14
14
Last month
0
0
checked on May 10, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.