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首页> 外文期刊>ACS Macro Letters >Synthesis of a Fluoromethacrylate Hydroxystyrene Block Copolymer Capable of Rapidly Forming Sub-5 nm Domains at Low Temperatures
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Synthesis of a Fluoromethacrylate Hydroxystyrene Block Copolymer Capable of Rapidly Forming Sub-5 nm Domains at Low Temperatures

机译：合成氟甲基甲酸羟基苯乙烯嵌段共聚物，其能够在低温下快速形成亚5nm结构域

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摘要

A series of poly(pentadecafluorooctyl methacrylate)-block-polyhydroxystyrene (PPDFMA-b-PHS) block copolymers (BCPs) were synthesized via reversible addition-fragmentation chain-transfer polymerization and subsequent deprotection. Because of the high incompatibility between hydroxyl groups and fluoro groups, the interaction parameter (chi) of these BCPs, determined by temperature-resolved small angle X-ray scattering (SAXS), was extremely high. The chi value of PPDFMA-b-PHS was 0.48 at 150 degrees C, 16X larger than the chi of polystyrene-block-poly(methyl methacrylate). The microphase behavior of PPDFMA-b-PHS with various volume fractions of PHS block was determined by SAXS, yielding ordered lamellar morphologies with different sizes of domain spacing (d), and further confirmed by transmission electron microscopy. The minimum d obtained was 9.8 nm annealed at a mild temperature for a short time (80 degrees C for 1 min) by SAXS analysis, indicating the width of each lamellar domains was <5 nm.
机译：通过可逆添加 - 破碎的链转移聚合和随后的脱保护合成了一系列聚（五碳氟辛基甲基丙烯酸酯） - 嵌段 - 多羟基苯乙烯（PPDFMA-B-PHS）嵌段共聚物（BCP）。由于羟基和氟基团之间的高不相容性，通过温度分辨的小角度X射线散射（SAXS）确定这些BCP的相互作用参数（CHI）非常高。 PPDFMA-B-PH的CHI值在150℃下为0.48，比聚苯乙烯 - 嵌段聚（甲基丙烯酸甲酯）大16倍。通过淋巴测定具有各种体积分数的PPDFMA-B-pH的磁镜行为，产生具有不同尺寸的畴间距（d）的有序的层状形态，并通过透射电子显微镜进一步证实。通过SAXS分析，在温和的温度下在温和的温度下（80℃持续1分钟），得到的最小D 9.8nm，表明每个层状结构域的宽度<5nm。

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