About: Stabilization of polyurethanes based on liquid OH-telechelic polybutadienes: comparison of commercial and polymer-bound antioxidants     Goto   Sponge   NotDistinct   Permalink

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Description
  • Reakcí OH-telechelického, nízkomolekulárního polybutadienu, bohatého na 1,2 jednotky, s toluen-2,4-diisokyanátem byl připraven rozpustný polyurethan. Na visící vinyly polybutadienových bloků tohoto polyurethanu byl radikálovým mechanismem adován (do různého stupně konverze) stéricky bráněný fenolický antioxidant nesoucí sulfanylovou skupinu (tj. 6-sulfanylhexyl 3(3,5-di-terc-butyl-4-hydroxyfenyl)propanoát). Metodou DSC bylo zjištěno, že přídavek takto modifikovaného polyurethanu do původního polyurethanu má stejný antioxidační účinek jako přídavek nízkomolekulárního analogu, v přepočtu na stejnou molární koncentraci fenolické struktury. (cs)
  • A soluble polyurethane was synthesized by a reaction of OH-telechelic, 1,2-rich, low-molecular-weight polybutadiene with toluene 2,4-diisocyanate. To the pendent vinyls of the polybutadiene blocks of the polyurethane, a sterically hindered phenolic antioxidant bearing a sulfanyl group (i.e., 6-sulfanylhexyl 3(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) was added by a free-radical mechanism (in varying degrees of conversion). It was found by the DSC method that an admixture of polyurethane thus modified to original polyurethane shows an equal antioxidation effect as an admixture of the low-molar-mass analog, as related to the same mole concentration of the phenolic moiety.
  • A soluble polyurethane was synthesized by a reaction of OH-telechelic, 1,2-rich, low-molecular-weight polybutadiene with toluene 2,4-diisocyanate. To the pendent vinyls of the polybutadiene blocks of the polyurethane, a sterically hindered phenolic antioxidant bearing a sulfanyl group (i.e., 6-sulfanylhexyl 3(3,5-di-tert-butyl-4-hydroxyphenyl)propanoate) was added by a free-radical mechanism (in varying degrees of conversion). It was found by the DSC method that an admixture of polyurethane thus modified to original polyurethane shows an equal antioxidation effect as an admixture of the low-molar-mass analog, as related to the same mole concentration of the phenolic moiety. (en)
Title
  • Stabilization of polyurethanes based on liquid OH-telechelic polybutadienes: comparison of commercial and polymer-bound antioxidants
  • Stabilizace polyurethanů na bázi kapalných OH-telechelických polybutadienů: srovnání komerčních a polymerně vázaných antioxidantů (cs)
  • Stabilization of polyurethanes based on liquid OH-telechelic polybutadienes: comparison of commercial and polymer-bound antioxidants (en)
skos:prefLabel
  • Stabilization of polyurethanes based on liquid OH-telechelic polybutadienes: comparison of commercial and polymer-bound antioxidants
  • Stabilizace polyurethanů na bázi kapalných OH-telechelických polybutadienů: srovnání komerčních a polymerně vázaných antioxidantů (cs)
  • Stabilization of polyurethanes based on liquid OH-telechelic polybutadienes: comparison of commercial and polymer-bound antioxidants (en)
skos:notation
  • RIV/61389013:_____/09:00323838!RIV09-AV0-61389013
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA203/07/0987), Z(AV0Z40500505)
http://linked.open...iv/cisloPeriodika
  • 4
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 343339
http://linked.open...ai/riv/idVysledku
  • RIV/61389013:_____/09:00323838
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • polyurethanes; liquid polybutadienes; polymeric antioxidants (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [379453F12356]
http://linked.open...i/riv/nazevZdroje
  • Polymer Degradation and Stability
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 94
http://linked.open...iv/tvurceVysledku
  • Kovářová, Jana
  • Netopilík, Miloš
  • Podešva, Jiří
  • Hrdličková, Miluše
http://linked.open...ain/vavai/riv/wos
  • 000265181100023
http://linked.open...n/vavai/riv/zamer
issn
  • 0141-3910
number of pages
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