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首页> 外文期刊>Journal of Applied Polymer Science >Partially fluorinated polymer networks: Synthesis and structural characterization
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Partially fluorinated polymer networks: Synthesis and structural characterization

机译：部分氟化的聚合物网络：合成与结构表征

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摘要

Functionalizacion of epoxy-based networks by the preferential surface enrichment of perfluorinated tails to achieve hydrophobic surface is described. The selected fluorinated epoxies (FE) were: 2,2,3,3,4,4,5,5,6,6,7,7,8,9,9,9- hexadecafluoro-8-trifluoromethyl nonyloxirane (FED3) and 2,2,3,3,4,4,5,5,6,6,7, 7,8,8,9,9,9-heptadecafluoro nonyloxirane (FES3). Two series of crosslinked fluorinated epoxy-based materials containing variable fluorine contents (from 0 to 5 wt % F) were prepared using formulations based on partially fluorinated diamine, epoxy monomer and a curing agent. The epoxy monomer was based on diglycidyl ether of bisphenol A (DGEBA) while the curing agents were either propyleneoxide diamine (JEFFAMINE) or 4,4′-methylenebis(3-chloro 2,6-diethylaniline) (MCDEA). It was found that depending on the curing agent employed, homogeneous distribution of fluorine or phase separation distinguishable at micrometer or nanometer scale was obtained when curing blends initially homogeneous. The morphology and composition of partially fluorinated networks were investigated on a micrometer scale combining scanning electron microscopy and X-ray analysis. When curing with JEFFAMINE, samples were homogeneous for all fluorine proportions. In contrast, MCDEA-cured blends showed fluorine-rich zones dispersed in a continuous epoxy-rich phase. A completely different morphology, characterized by a distribution of irregular fluorine-rich domains dispersed in an epoxy-rich phase, was obtained when curing blends initially immiscible.
机译：描述了通过全氟化尾部的优先表面富集来实现疏水性表面的环氧基网络的功能化。所选的氟化环氧树脂（FE）为：2,2,3,3,4,4,5,5,6,6,7,7,8,9,9,9-十六氟-8-三氟甲基壬基环氧乙烷（FED3）和2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-七氟壬基环氧乙烷（FES3）。使用基于部分氟化的二胺，环氧单体和固化剂的配方，制备了两种含氟量可变（F含量为0至5 wt％）的交联氟化环氧树脂基材料。环氧单体基于双酚A的二缩水甘油醚（DGEBA），而固化剂为环氧丙烷二胺（JEFFAMINE）或4,4'-亚甲基双（3-氯2,6-二乙基苯胺）（MCDEA）。已经发现，取决于所使用的固化剂，当固化共混物最初是均匀的时，可以获得在微米或纳米尺度上可分辨的氟的均匀分布或相分离。结合扫描电子显微镜和X射线分析，在微米级上研究了部分氟化网络的形态和组成。用JEFFAMINE固化时，所有氟含量的样品均质。相反，MCDEA固化的混合物显示出富氟区域分散在连续的富环氧相中。当固化最初不混溶的共混物时，获得了完全不同的形态，其特征是分散在富环氧相中的不规则富氟域分布。

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