21-Butylhentetraconta-1,40-diene | 1172580-66-3

• 分子结构分类: 有机化合物 - 碳氢化合物 - 不饱和烃
• 英文名称: 21-Butylhentetraconta-1,40-diene
• 英文别名: 21-butylhentetraconta-1,40-diene
• CAS: 1172580-66-3
• 化学式: C₄₅H₈₈
• 分子量: 629.194
• InChiKey: XUNNSFQDYWHFIO-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  23.3
• 重原子数：
  45
• 可旋转键数：
  41
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.91
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  10-十一烯-1-醇 在 Grubbs catalyst first generation 、 六甲基磷酰三胺 、 Wilkinson's catalyst 、 四溴化碳 、 potassium tert-butylate 、 氢气 、 氢化钾 、 三苯基膦 、 叔丁醇 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 、 二氯甲烷 、 甲苯 为溶剂， 55.0 ℃ 、6.21 MPa 条件下， 生成 21-Butylhentetraconta-1,40-diene
  参考文献：
  名称：

  Decreasing the Alkyl Branch Frequency in Precision Polyethylene: Effect of Alkyl Branch Size on Nanoscale Morphology

  摘要：

  Synthesis and morphological characterization are reported for a series of 13 precision branched polyethylene structures, the branch being placed on every 39th carbon and varying in size from methyl to pentadecyl group. A recently established synthetic scheme for preparation of the symmetrical alpha,omega-diene monomer was employed to increase the number of methylene carbons between the branch points from 20 to 38, yielding polymers with 5.26 mol % alpha-olefin incorporation. The morphology of these polymers was investigated using differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAX])), and transmission electron microscopy (TEM). Methyl branching significantly reduces the melting point and single crystal lamellae thickness of unbranched polyethylene. On the other hand, all further branches from ethyl to pentadecyl produce polymers that have similar melting points and single crystal lamellae thicknesses. A dear change in the morphology of both solution and melt-grown crystals of these polymers was observed from a situation where the methyl branch is incorporated in the polymer's unit cell to one where branches of greater mass are mostly expelled from the unit cell.

  DOI：

  10.1021/ma3002577

文献信息

• Decreasing the Alkyl Branch Frequency in Precision Polyethylene: Effect of Alkyl Branch Size on Nanoscale Morphology
  作者：Bora Inci、Ingo Lieberwirth、Werner Steffen、Markus Mezger、Robert Graf、Katharina Landfester、Kenneth B. Wagener

  DOI：10.1021/ma3002577

  日期：2012.4.24

  Synthesis and morphological characterization are reported for a series of 13 precision branched polyethylene structures, the branch being placed on every 39th carbon and varying in size from methyl to pentadecyl group. A recently established synthetic scheme for preparation of the symmetrical alpha,omega-diene monomer was employed to increase the number of methylene carbons between the branch points from 20 to 38, yielding polymers with 5.26 mol % alpha-olefin incorporation. The morphology of these polymers was investigated using differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAX])), and transmission electron microscopy (TEM). Methyl branching significantly reduces the melting point and single crystal lamellae thickness of unbranched polyethylene. On the other hand, all further branches from ethyl to pentadecyl produce polymers that have similar melting points and single crystal lamellae thicknesses. A dear change in the morphology of both solution and melt-grown crystals of these polymers was observed from a situation where the methyl branch is incorporated in the polymer's unit cell to one where branches of greater mass are mostly expelled from the unit cell.