本文選題：二氧化碳 + 環(huán)氧丙烷　； 參考：《高分子學(xué)報》2017年02期

【摘要】：利用Zn-Co雙金屬氰化物為催化劑,疏水性二季戊四醇(DPE)作為起始劑,實現(xiàn)了二氧化碳(CO_2)和環(huán)氧丙烷(PO)的不死共聚合,高效、高選擇性地合成了支化結(jié)構(gòu)CO_2基六元醇,且該產(chǎn)物有6個羥基封端.該支化CO_2基六元醇的合成路線具有可控的特點,其分子量可通過PO與DPE的摩爾比準(zhǔn)確控制(1500~8000),同時分子量分布很窄(最低至1.08).值得注意的是,降低反應(yīng)溫度可顯著改善聚合選擇性,例如,當(dāng)溫度為50℃時,產(chǎn)物碳酸酯單元含量高達(dá)60%,而反應(yīng)副產(chǎn)物環(huán)狀碳酸酯的含量可控制在5.5 wt%以下,但是體系催化活性下降至0.14 kg g-1.該支化結(jié)構(gòu)CO_2基六元醇有望作為高交聯(lián)密度的多元醇,用于制備高強硬質(zhì)聚氨酯泡沫材料.
[Abstract]:Using Zn-Co bimetallic cyanide as catalyst and hydrophobic dipentaerythritol (DPE) as initiator, the undead copolymerization of CO _ 2 and PO _ (2) was carried out. The branched CO_2 unit hexadecyl alcohol was synthesized efficiently and highly selectively. There are 6 hydroxyl groups in the product. The synthetic route of the branched CO_2 hexadecyl alcohol is controllable. Its molecular weight can be accurately controlled by the molar ratio of PO to DPE, and the molecular weight distribution is very narrow (the lowest is to 1.08C). It is worth noting that the polymerization selectivity can be significantly improved by lowering the reaction temperature. For example, when the reaction temperature is 50 鈩，

本文編號：1870755