A novel catalytic two-step process for the preparation of rigid polyurethane foams: synthesis, mechanism and computational studies,Reaction Chemistry & Engineering

当前位置： X-MOL 学术 › React. Chem. Eng. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A novel catalytic two-step process for the preparation of rigid polyurethane foams: synthesis, mechanism and computational studies
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2021-4-21 , DOI: 10.1039/d1re00102g
Loredana Maiuolo _{1,

2,

3,

4} , Fabrizio Olivito _{1,

2,

3,

4} , Fortuna Ponte _{1,

2,

3,

4} , Vincenzo Algieri _{1,

2,

3,

4} , Matteo Antonio Tallarida _{1,

2,

3,

4} , Antonio Tursi _{1,

2,

3,

4} , Giuseppe Chidichimo _{1,

2,

3,

4} , Emilia Sicilia _{1,

2,

3,

4} , Antonio De Nino _{1,

2,

3,

4}

Affiliation

Polyurethanes (PUs) are very versatile and popular polymers that play a key role in the automotive, construction and non-food consumable sectors. In general, two-step polyurethane synthetic procedures involve the addition of catalysts also in the second phase of the reaction with problems of high environmental impact and disposal. In this work, an innovative eco-sustainable and very cheap procedure for the production of high-quality rigid polyurethane (PU) foams was developed, starting from polyethylene glycol (PEG 400) and diisocyanates as reagents and using common inorganic salts as catalysts, such as sodium chloride. In particular, our innovatory method is based on a single initial addition of a very cheap catalyst that is proved to be effective for both the prepolymer formation and polyurethane chain elongation. Moreover, simultaneous with the formation of final polyurethane, the salt was restored for a new catalytic cycle. Then, our strategy for polyurethane foam synthesis can surely represent a valid alternative as a very inexpensive and eco-compatible process, also for the industrial field. Finally, detailed mechanistic hypotheses were formulated and supported by DFT calculations.

中文翻译：

一种新的催化两步法制备硬质聚氨酯泡沫的方法：合成，机理和计算研究

聚氨酯（PU）是一种用途广泛且流行的聚合物，在汽车，建筑和非食品消耗品领域起着关键作用。通常，两步聚氨酯合成方法涉及在反应的第二阶段中也添加催化剂，其具有对环境的高影响和处置问题。在这项工作中，从聚乙二醇（PEG 400）和二异氰酸酯作为试剂开始，并使用常见的无机盐作为催化剂，开发了一种创新的生态可持续且非常廉价的生产高质量硬质聚氨酯（PU）泡沫的方法。作为氯化钠。特别是，我们的创新方法基于一次非常便宜的催化剂的一次添加，事实证明该催化剂对预聚物的形成和聚氨酯链的延长均有效。而且，在形成最终聚氨酯的同时，将盐还原以进行新的催化循环。然后，我们的聚氨酯泡沫合成策略无疑可以作为一种非常便宜且生态兼容的方法，代表一种有效的替代方法，同样适用于工业领域。最后，详细的力学假设被提出并得到DFT计算的支持。

更新日期：2021-05-06

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11