生物可再生氧化 pentane-1,2,5-triol作为一个来源,在刚性聚氨泡的合并
Georgy Grancharov1, Mariya-Desislava Atanasova1, Radostina Kalinova1
1Institute of Polymers, Bulgarian Academy of Sciences, Acad. G. Bontchev Str. bl. 103A, 1113 Sofia, Bulgaria.
Polymers
|October 28, 2023
概括
研究人员使用生物可再生-1,2,5-二醇,来自基纤维素,开发了刚性聚氨泡. 这些可持续的聚氨具有增强的压力强度和与商业配方可比的热性能.
科学领域:
- 聚合物科学 聚合物科学
- 可持续化学 可持续化学
- 材料科学 材料科学 材料科学
背景情况:
- 聚氨生产在很大程度上依赖于石化原料.
- 在聚合物制造中,对可持续替代品和可再生原材料的需求日益增加.
- 开发生物基聚合物对于聚氨泡的环保开发至关重要.
研究的目的:
- 合成和利用生物可再生-1,2,5-醇用于固态聚氨泡制备.
- 研究结合生物基聚合物的刚性聚氨的特性.
- 评估在高性能聚合物应用中纤维素衍生材料的潜力.
主要方法:
- 阿克马托维奇的重新排列和C5酒精的化降解以产生-1,2,5-三醇.
- 生物基三醇的氧化化.
- 通过NMR光谱,基数和粘度对生物基聚的表征.
- 泡制剂含有高达30%的生物可再生聚合物.
- 评估泡特性,包括压力应力,热重力测量,动态机械分析和扫描电子显微镜.
主要成果:
- 从可生物可再生C5酒精中成功合成氧化 pentane-1,2,5-triol.
- 将高达30%的生物基聚合物纳入刚性聚氨泡中.
- 实现了超过400.0kPa的增强压力强度.
- 观察到可比的热降解范围 (325-450°C) 和形态特性与商业聚氨相似.
结论:
- 来自红纤维素的坦-1,2,5-醇是一种可行的生物基替代品,用于生产刚性聚氨泡.
- 改性聚氨显示出具有竞争力的机械和热性能.
- 这项研究强调了一条通往可持续聚氨材料的有希望的途径.
相关概念视频
01:16Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
2.6K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.6K
02:35Free-Radical Chain Reaction and Polymerization of Alkenes
7.9K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.9K
01:20Types of Step-Growth Polymers: Polyesters
2.3K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.3K
01:13Olefin Metathesis Polymerization: Overview
2.1K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.1K
01:08Molecular Weight of Step-Growth Polymers
2.2K
Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.2K
03:08Hydroboration-Oxidation of Alkenes
8.3K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
8.3K