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首页> 外文期刊>Energy & fuels >Kinetic Hydrate Inhibition of Poly(A/-isopropylmethacrylamide)s with Different Tacticities
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Kinetic Hydrate Inhibition of Poly(A/-isopropylmethacrylamide)s with Different Tacticities

机译：动力学水合物对不同策略聚（A /-异丙基甲基丙烯酰胺）的抑制作用

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摘要

Poly(N-isopropylmethacrylamide)s (PNIPMAMs) have become commercially available as kinetic hydrate inhibitors (KHIs). PNIPMAMs are usually made by standard radical polymerization, which does not allow control over the polymer tacticity. We have now synthesized PNIPMAMs using stereospecific radical polymerization giving a fairly high degree of tacticity control. In this paper we present results on the performance of different tacticities in KHI tests with synthetic natural gas in stirred autoclaves and on tetrahydrofuran (THF) structure II hydrate crystal growth. The molecular weights of these polymers are almost the same. From the results, we can conclude the effect of polymer tacticity on the KHI performance of PNIPMAMs is noticeable but not very significant. PNIPMAMs with a higher syndiotactic percentage performed slightly better man PNIPMAMs with a lower syndiotactic percentage. Both polymers also gave a similar effect on the morphology of the THF hydrate crystals, indicating some kind of crystal surface adsorption. The PNIPMAMs investigated have a fairly high syndiotactic percentage. In fact, we found that it was difficult to make PNIPMAMs with less than 45% syndiotactic percentage, even using standard radical polymerization methods. This suggests that any method to make commercial NIPMAM-based polymer KHIs via radical polymerization will necessarily give polymers with a fairly high percentage of syndiotacticity.
机译：聚（N-异丙基甲基丙烯酰胺）（PNIPMAMs）作为动力学水合物抑制剂（KHIs）已在市场上出售。 PNIPMAM通常通过标准的自由基聚合反应制得，这无法控制聚合物的立构规整度。现在，我们已经使用立体定向自由基聚合合成了PNIPMAM，从而提供了相当高的立构规整度。在本文中，我们介绍了在搅拌高压釜中使用合成天然气进行的KHI试验中不同策略的性能以及四氢呋喃（THF）结构II水合物晶体生长的结果。这些聚合物的分子量几乎相同。从结果可以得出结论，聚合物立构规整度对PNIPMAMs的KHI性能有显着影响，但不是很显着。间规百分比较高的PNIPMAM与间规百分比较低的PNIPMAM相比，性能要好一些。两种聚合物还对THF水合物晶体的形态产生相似的影响，表明某种晶体表面吸附。被调查的PNIPMAM具有较高的间规百分比。实际上，我们发现即使使用标准的自由基聚合方法，也难以制备间规百分比低于45％的PNIPMAM。这表明，通过自由基聚合制备商业基于NIPMAM的聚合物KHI的任何方法都必定会使聚合物具有相当高的间同立构规整度。

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  • 来源
    《Energy & fuels》 |2012年第mayajuna期|p.3577-3585|共9页
  • 作者

    Pei Cheng Chua; Malcolm A. Kelland; Kenji Ishitake; Kotaro Satoh; Masami Kamigaito; Yoshio Okamoto;

  • 作者单位

    Department of Mathematics and Natural Sciences, Faculty of Science and Technology, University of Stavanger, N-4036 Stavanger, Norway;

    Department of Mathematics and Natural Sciences, Faculty of Science and Technology, University of Stavanger, N-4036 Stavanger, Norway;

    Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Nagoya University, Nagoya 464-8603, Japan and College of Material Science and Chemical Engineering, Harbin Engineering University, Nantong St. Harbin, P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    av: average; rnEG: ethylene glycol; rnM_n: number average molecular weight; rnM_w: weight average molecular weight; rnPVCap: poly(N-vinylcaprolactam) et al;

    机译：av：平均值;rnEG：乙二醇;rnM_n：数均分子量;rnM_w：重均分子量;rnPVCap：聚（N-乙烯基己内酰胺）等;

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