Structure and surface properties of polyacrylates with short fluorocarbon side chain: Role of the main chain and spacer group
Structure and surface properties of polyacrylates with short fluorocarbon side chain: Role of the main chain and spacer group
复制标题
短氟碳侧链聚丙烯酸酯的结构和表面性能：主链和间隔基团的作用
DOI：
10.1002/pola.24038
复制
发表时间：
2010-06
期刊：
影响因子：
--
通讯作者：
F. Chen
中科院分区：
文献类型：
--
作者：
Q. Wang;Q. Zhang;X. Zhan;F. Chen
含长全氟烷基聚丙烯酸酯S的降解，特别是含全氟辛基的降解，会导致生物持久性的全氟辛酸或全氟辛磺酸的释放。为了寻找环境友好的替代品，合成并表征了一系列侧链上含有全氟己基的非生物阻燃型含氟聚合物。重点研究了主链和含氟链段之间侧链上的主链和间隔基对poly[2-[[[[2-(perfluorohexyl)]-sulfonyl]methyl]amino]ethyl]丙烯酸酯(PC6SA)、甲基丙烯酸酯(PC6SMA)和聚[(全氟己基)乙基]甲基丙烯酸酯(PC6MA)性能的影响。用接触角、差示扫描量热法、光学偏光显微镜和广角X射线散射法研究了这些聚合物的表面性质和氟化侧链的本体结构。并与聚[(全氟己基)乙基]丙烯酸酯(PC6A)的结果进行了比较。它们的表面自由能都很低。令人惊讶的是，具有相同全氟烷基链的PC6SA和带有N-甲基磺酰胺间隔基团的PC6SMA被发现以液晶层状结构组织，而PC6A和PC6MA被发现是无定形的。这主要归因于N-甲基磺酰胺基团的空间项和极性倾向于促进近晶相中全氟链段的取向。PC6SA、PC6SMA和PC6MA具有较低的表面分子迁移率，具有丰富的动态拒水性能。这种现象与侧链晶化或玻璃化转变温度较高有关。2010Wiley期刊公司，J Polym Sci Part A：Polym Chem 48：2584-2593,2010
The degradation of poly(fluoroalkyl acrylate)s with long perfluoroalkyl groups, especially with perfluorooctyl group, leads to the release of biopersistent perfluorooctanoic acid (PFOA) or perfluorooctanesulfonic acid (PFOS). To find the environmentally friendly substitutes, a series of nonbiopersistant fluorinated polymers containing perfluorohexyl groups in the side chains have been synthesized and characterized. This study was then focused on the role played by the main chain and spacer group located in the side chain between the backbone and the fluorinated segment and, in particular, on the properties of poly[2-[[[[2-(perfluorohexyl)]-sulfonyl]methyl]amino]ethyl] acrylate (PC6SA), methacrylate (PC6SMA) and poly[(perfluorohexyl)ethyl] methacrylate (PC6MA). Surface properties and bulk organization of fluorinated side chains of those polymers were investigated by contact angles, differential scanning calorimetry, optical polaring microscopy, and wide-angle X-ray scattering. Results were compared with those obtained with poly[(perfluorohexyl) ethyl] acrylate (PC6A). They all had very low surface free energies. Surprisingly, with the same perfluoalkyl chain, PC6SA and PC6SMA with a N-methylsulfonamide spacer group were found to be organized in a liquid crystalline lamellar structure, whereas PC6A and PC6MA were found to be amorphous. This was mainly attributed to the steric term and polarity of N-methylsulfonamide group that tended to facilitate the orientation of the perfluorinated segments in smectic phases. PC6SA, PC6SMA, and PC6MA had rich dynamic water repellency because of the low surface molecular mobility. This phenomenon relates to the crystallization of side chains or high glass transition temperature. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2584–2593, 2010
登录
查看更多内容
DOI：
10.1002/pol.1972.110100703
发表时间：
1972-07
期刊：
Journal of Polymer Science Part B: Polymer Letters
影响因子：
--
作者：
J. Roitman;A. Pittman
通讯作者：
J. Roitman;A. Pittman
影响因子：
1.9
作者：
H. Lehmler;V. R. Rama Rao;D. Nauduri;J. Vargo;S. Parkin
通讯作者：
H. Lehmler;V. R. Rama Rao;D. Nauduri;J. Vargo;S. Parkin
影响因子：
0.7
作者：
M. Broniatowski;P. Dynarowicz-Łątka;W. Witko-
通讯作者：
M. Broniatowski;P. Dynarowicz-Łątka;W. Witko-
影响因子：
1.9
作者：
T. Maekawa;S. Kamata;M. Matsuo
通讯作者：
T. Maekawa;S. Kamata;M. Matsuo
DOI：
10.1021/j100812a518
发表时间：
1962-06
期刊：
The Journal of Physical Chemistry
影响因子：
--
作者：
M. K. Bernett;W. Zisman
通讯作者：
M. K. Bernett;W. Zisman