Synthesis of Carbonate Derivatives and Derived Cetane Number for the Use of Diesel Additives
作者:Chang-Yong Cho、Keun-Woo Chung、Young-Wun Kim、Yeong-Joon Kim
DOI:10.5012/jkcs.2010.54.02.234
日期:2010.4.20
경유 첨가제로 사용할 수 있는 카보네이트 유도체를 합성하고 그들의 DCN 향상 효과를 살펴보았다. 1,2-글리세롤 카보네이트와 긴 알킬그룹을 가지는 지방산을 반응시켜 경유와 구조적으로 유사한 화합물을 얻었다. 경유에 대한 용해도를 증가시키기 위해 긴 체인 중간에 이중 결합을 도입하거나 카보닐 그룹의 알파 위치에 알킬기를 도입하였다. ASTM 방법을 통하여 측정한 이들의 DCN 증가 정도는 ~1 정도였으며 이 결과는 카보네이트 유도체 화합물이 연료 첨가제로서 사용이 가능하다는 것을 보여주고 있다.
Carbonate derivatives were synthesized for the use of diesel additives and the derived cetane numbers of the derivatives were measured. Some carbonate ester derivatives were synthesized from 1,2-glycerol carbonate and long alkyl chain fatty acids. To improve the solubility, we introduced unsaturated groups into aliphatic carbons and alkyl group into $\alpha}$-carbon to the carbonyl group. The derived cetane numbers obtained from ASTM method were increased up to 1.0, which means some carbonate derivatives could be potential diesel additives.
Original biobased nonisocyanate polyurethanes: solvent- and catalyst-free synthesis, thermal properties and rheological behaviour
作者:Camille Carré、Lara Bonnet、Luc Avérous
DOI:10.1039/c4ra09794g
日期:——
Novel biobased NonIsocyanatePolyUrethanes (NIPUs) were synthesized from dimer-based diamines and sebacic biscyclocarbonate in bulk, and without catalyst. All synthesized NIPUs present biobased contents around 80%. Biscyclocarbonates and final NIPUs were characterized by FTIR and NMR spectroscopy. A specific study was conducted to determine the best carbonate to amine ratio. The influence on the structures
新型的生物基非异氰酸酯聚氨酯(NIPU)是由二聚体基二胺和癸二酸二环碳酸酯在没有催化剂的条件下合成的。所有合成的NIPU都具有约80%的生物基含量。通过FTIR和NMR光谱对双环碳酸酯和最终的NIPU进行表征。进行了一项具体研究,以确定最佳的碳酸盐与胺之比。通过DSC,SEC和动态流变分析研究了平均胺官能度从2.0到2.2的NIPU对结构和性能的影响。基于FTIR分析,发现化学计量比对于NIPU合成而言是最佳的,以获得具有适当动力学的最高摩尔质量。但是,结果表明,摩尔质量(高达22000 g mol -1)低于常规聚氨酯。当二胺二聚体的平均官能度增加时,观察到由于较高的交联度导致的特定结构。如预期的那样,在这种情况下,玻璃化转变温度升高。合成具有2.15和2.2的平均胺官能度的交联样品。然后获得伸长率高于600%的有希望的弹性体样品。
Organocatalytic synthesis of novel renewable non-isocyanate polyhydroxyurethanes
Novel fully renewable AA‐BB type non‐isocyanate polyhydroxyurethanes were synthesized by the classical reaction between a diamine and a dicyclocarbonate. Sebacic acid was first reacted with an excess of glycerol carbonate, in presence of DCC and DMPA, leading to a renewable dicyclocarbonate monomer. Then, this monomer was reacted with several renewable diamines, in presence of 1,5,7‐triazabicyclo[4
Biocatalytic and solvent-free synthesis of a bio-based biscyclocarbonate
作者:D. S. Wunschik、K. N. Ingenbosch、M. Zähres、J. Horst、C. Mayer、M. Jäger、V. Strehmel、M. Dornbusch、K. Hoffmann-Jacobsen
DOI:10.1039/c8gc02267d
日期:——
An enzymatically controlled one-step synthesis of a non-isocyanate polyurethane monomer from sustainable resources is feasible under mild reaction conditions.
在温和的反应条件下,从可持续资源中通过酶控制的一步合成非异氰酸酯聚氨酯单体是可行的。
Synthesis, characterization and reactivity of a six-membered cyclic glycerol carbonate bearing a free hydroxyl group
作者:M. Tryznowski、Z. Żołek-Tryznowska、A. Świderska、P. G. Parzuchowski
DOI:10.1039/c5gc01688f
日期:——
Five- and six-membered cyclic carbonates, have recently become popular as starting materials for synthesis of polycarbonates via ring opening polymerization or synthesis of an environmentally friendly non-isocyanate polyurethanes. In many...