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首页> 外文期刊>RSC Advances >Synthesis of poly(n-hexyl methacrylate)-b-poly( methyl methacrylate) via anionic polymerization with t-BuOK as the initiator at ambient temperature
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Synthesis of poly(n-hexyl methacrylate)-b-poly( methyl methacrylate) via anionic polymerization with t-BuOK as the initiator at ambient temperature

机译：通过在环境温度下用T-Buok的阴离子聚合合成聚（N-己基甲基丙烯酸甲酯）-B-聚（甲基丙烯酸甲酯）作为引发剂

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摘要

To break through the industrial development bottlenecks of anionic polymerization in the field of polar monomers, poly n-hexyl methacrylate (PHMA) was prepared at 0 degrees C, 30 degrees C, and 60 degrees C with potassium tert-butoxide (t-BuOK) as the initiator in tetrahydrofuran (THF) and the conversions were almost complete. Gel permeation chromatography (GPC) analysis of poly n-hexyl methacrylate indicated that t-BuOK existed in numerous states when dissolved in THF, including different types of association and ion-pairs. A series of block copolymers of n-hexyl methacrylate (n-HMA) and methyl methacrylate (MMA), PMMA-b-PHMA (Mn 8200-16 200) and PHMA-b-PMMA (Mn 19 100-9500) were synthesized at 0 degrees C, and conversions were close to 100%. The results of dynamic mechanical analysis (DMA) indicated that there were two glass transition temperatures, -10 to 0 degrees C for the PHMA block and 100 to 110 degrees C for the PMMA block. Furthermore, the competing behaviors of n-HMA and MMA in copolymerization were investigated by one-shot feeding of two types of monomers at 0 degrees C, 30 degrees C, and 60 degrees C. The kinetics curves and C-13-NMR analysis of the copolymers indicated that the polymerization of n-HMA in the copolymerization was significantly dominant over that of MMA at set temperatures. The results in this study provided the possibility to realize anionic polymerization of methacrylate esters on a commercial scale.
机译：通过在极性单体的场阴离子聚合的工业发展的瓶颈，聚正己基甲基丙烯酸酯（PHMA）在0℃，30℃，并用叔丁醇钾60度C制备破裂（叔丁醇钾）如在四氢呋喃（THF）的引发剂和转化率几乎完全。凝胶渗透色谱法（GPC）的聚丙烯酸正己酯的分析表明溶解于THF时，包括不同类型的关联和离子对在许多规定，叔丁醇钾的存在。一系列正己酯（正HMA）和甲基丙烯酸甲酯（MMA）的嵌段共聚物的，PMMA-B-PHMA（MN 8200-16 200）和PHMA-B-PMMA（MN 19 100-9500）在合成0℃，并且转化率接近100％。动态力学分析（DMA）的结果表明，有两个玻璃化转变温度，-10℃至0摄氏度的PHMA块和100至110摄氏度的PMMA嵌段。此外，正和HMA MMA的共聚竞争行为进行了两种类型的单体中的单触发馈送在0℃，30℃，和60℃的动力学曲线和C-13-NMR的分析研究共聚物表明正HMA的共聚合中的聚合是在显著设定温度主导超过该MMA的。在该研究的结果提供给实现甲基丙烯酸酯的阴离子聚合在商业规模上的可能性。

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  • 来源
    《RSC Advances》 |2017年第85期|共6页
  • 作者

    Zheng Anna; Su Ling; Li Zheng; Zou Guijin; Xu Xiang; Guan Yong;

  • 作者单位

    East China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Mat Sci &

    Engn Key Lab Special Funct Polymer Mat &

    Related Techn Shanghai 200237 Peoples R China;

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