PREPARATION AND CHARACTERIZATION OF PURE OLIGO(ETHYLENE GLYCOL)S .2.
PREPARATION AND CHARACTERIZATION OF PURE OLIGO(ETHYLENE GLYCOL)S .2.
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DOI：
10.1021/ma00045a003
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发表时间：
1992-09-14
期刊：
影响因子：
5.5
通讯作者：
HATTORI, S
中科院分区：
文献类型：
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作者：
KINUGASA, S;TAKATSU, A;HATTORI, S
采用分步合成法，结合制备级粒径排斥色谱法（SEC）分离制备了低聚乙二醇（OEG）的纯样品——四五aconta（乙二醇）(HO（CH2CH2O)54H (OEG54)）。OEG54样品的纯度已通过分析SEC和差示扫描量热法进行了检测。此外，通过质谱、光散射、蒸汽压渗透法、C-13核磁共振和H-1核磁共振测定了OEG54样品和先前制备的octadeca（乙二醇）（OEG18）纯样品的分子量。OEG样品的观察到的MW值与它们的化学式的预期值吻合得很好。在LS和H-1核磁共振测量中观察到的相当好的一致性表明，这些纯OEG样品可以用作理想的MW标准样品。
A pure sample of an oligo(ethylene glycol) (OEG), tetrapentaconta(ethylene glycol) (HO(CH2CH2O)54H (OEG54)), has been prepared by stepwise synthesis coupled with preparative size exclusion chromatography (SEC) used as a separation method. The purity of the OEG54 sample has been checked by analytical SEC and differential scanning calorimetry. Furthermore, the molecular weights (MW) of the OEG54 sample and a pure sample of octadeca(ethylene glycol) (OEG18) previously prepared have been determined by mass spectroscopy, light scattering (LS), vapor pressure osmometry, C-13 NMR, and H-1 NMR. The observed MW values of the OEG samples are in good agreement with those expected from their chemical formulas. In particular, fairly good agreements observed in LS and H-1 NMR measurements show that these pure OEG samples can be used as ideal MW standard samples.