合成了一系列分子量分别为M n = 10000和20000的全氟烷基封端的聚环氧乙烷(PEO),记为F-HEUR-10K和F-HEUR-20K,结构明确反应步骤。PEO与大量过量的异佛尔酮二异氰酸酯(IPDI)反应生成异氰酸酯封端的预聚物,然后该预聚物与半氟化醇[C 8 F 17(CH 2)11 OH]反应。改进了实验条件以防止合成第一步中的缩聚。功能化程度由19控制1 H NMR。已经研究了末端全氟化基团对水溶液线性粘弹性的影响,该影响是聚合物浓度C pol,PEO链长,官能化程度,表面活性剂(SDS)和温度的函数。静态粘度的急剧增加η 0,归因于与一个multiconnected网络的形成溶胶-粘弹性过渡,在观察Ç POL ≈1重量%。应力松弛函数G(t)最好由拉伸指数G(t)= G 0 exp [-(t /τ)α ]拟合,其中G 0是弹性平稳模量。弛豫时间τ和静态粘度η 0,发现根据
Fluorinated phosphonic acid compounds, useful as treatments for substrate surfaces, have the formula (I) : wherein: R1 is a straight chain alkylene group having from 3 to 21 carbon atoms, an oxa-substituted straight chain alkylene group having from 2 to 20 carbon atoms, or a thia-substituted straight chain alkylene group having from 2 to 20 carbon atoms; R2 is a perfluoroalkyl group having from 4 to 10 carbon atoms; R3 is hydrogen, an alkali metal cation, or an alkyl group having from 1 to 6 carbon atoms; and M is hydrogen or an alkali metal cation, with the proviso that if R1 is an unsubstituted straight chain alkylene group, then the sum of carbon atoms in R1 and R2 combined is at least 10.
METHOD FOR PREPARING FLUORINATED BENZOTRIAZOLE COMPOUNDS
申请人:BOARDMAN Larry D.
公开号:US20080114177A1
公开(公告)日:2008-05-15
Fluorinated benzotriazole compounds may be prepared by contacting a fluorochemical monofunctional compound, such a fluorinated alcohol, with a carboxybenzotriazole in the presence of a coupling agent, and an optional amine catalyst.
Light-mediated iodoperfluoroalkylation of alkenes/alkynes catalyzed by chloride ions: role of halogen bonding
作者:Redouane Beniazza、Lionel Remisse、Damien Jardel、Dominique Lastécouères、Jean-Marc Vincent
DOI:10.1039/c8cc02765j
日期:——
deoxygenated methanol solutions containing catalytic amounts of NaCl or Bu4NCl. Preliminary mechanistic studies indicate that the light-promoted homolytic cleavage of the Rf–I bond that initiates the reaction is facilitated by the halogenbonding interaction between RfI and chloride ions.
描述了用于烯烃/炔烃的碘全氟烷基化的创新方法。这些反应,包括烯烃的碘三氟甲基化,在低强度的UVA辐射下,在含有催化量的NaCl或Bu 4 NCl的脱氧甲醇溶液中,非常有效地进行。初步的机理研究表明,R f I和氯离子之间的卤素键相互作用促进了引发反应的R f -I键的光促进均裂。
Fluorinated phosphonic acids
申请人:3M Innovative Properties Company
公开号:US20030228469A1
公开(公告)日:2003-12-11
Fluorinated phosphonic acid compounds, useful as treatments for substrate surfaces, have the formula:
1
wherein:
R
1
is a straight chain alkylene group having from about 3 to about 21 carbon atoms, an oxa-substituted straight chain alkylene group having from about 2 to about 20 carbon atoms, or a thia-substituted straight chain alkylene group having from about 2 to about 20 carbon atoms;
R
2
is a perfluoroalkyl group having from about 4 to about 10 carbon atoms;
R
3
is hydrogen, an alkali metal cation, or an alkyl group having from about 1 to about 6 carbon atoms; and
M is hydrogen or an alkali metal cation,
with the proviso that if R
1
is an unsubstituted straight chain alkylene group, then the sum of carbon atoms in R
1
and R
2
combined is at least 10.
PHASE TRANSFER SYNTHESIS OF SYMMETRICAL DI-<i>TERMINALLY</i> PERFLUORINATED ALKYL TRITHIOCARBONATES
作者:C. Naud、P. Calas、H. Blancou、A. Commeyras
DOI:10.1080/10426500008042093
日期:2000.6.1
Symmetrical di-terminally perfluorinated alkyl trithiocarbonates having the formula [F(CF2)(n)(CH2)(m)S](2)CS (n = 4,6,8 m = 2 and n = 6,8 m = 11) were prepared in good yield under phase-transfer catalytic conditions starting from perfluoroalkyl alkyl iodides F(CF2)(n)(CH2)(m)I.