具有水解稳定的基聚乙烯的功能化
Susi Hervàs-Arnandis1, Brenda Palomar-de Lucas1, Cristina Bilanin1
1Instituto de Tecnología Química (UPV-CSIC), Universidad Politècnica de València-Consejo Superior de Investigaciones Científicas Avda. de los Naranjos s/n 46022 Valencia Spain joliverm@itq.upv.es anleyva@itq.upv.es.
RSC advances
|August 14, 2023
概括
本研究介绍了一种方法,通过结合基组来化学修改低密度 (LD) 和高密度聚乙烯 (HDPE). 这些上循环聚乙烯具有出色的水解稳定性,可以转化为各种功能衍生物.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 可持续化学 可持续化学
背景情况:
- 聚乙烯 (PE) 是一种广泛使用的塑料,功能有限.
- 化学修饰PE可以增强其性能并扩大其应用.
- 开发有效和可持续的PE功能化方法对于塑料回收利用至关重要.
研究的目的:
- 在低密度 (LD) 和高密度聚乙烯 (HDPE) 中引入功能.
- 为了研究改性聚乙烯的水解稳定性.
- 探索上循环材料进一步化学转化的潜力.
主要方法:
- 在无溶剂条件下,LD和HDPE与乙基二乙酸 (EDA) 反应.
- 在催化基条件下,LD和HDPE与马氏无水化物 (MA) 和烯酸盐 (AC) 反应.
- 在pH值范围0-14.4的水解稳定性的评估.
- 进一步转化为碳酸,碳酸盐,和胺的演示.
主要成果:
- 在LD和HDPE中加入高达7%的质量%的基.
- 由此产生的聚乙烯 Ester 在极端的pH条件 (0-14) 中表现出高的水解稳定性.
- 成功地将化聚乙烯转化为碳酸盐,碳酸盐,其他和胺.
结论:
- 使用EDA或MA/AC,通过化进行LD和HDPE的化学上循环是可行的.
- 合成的聚乙烯 Ester具有强大的水解稳定性,扩大了它们的潜在应用.
- 的功能可以作为进一步化学衍生物的多功能手柄,使得创建新型聚合物结构成为可能.
相关概念视频
Types 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
Esters to Carboxylic Acids: Acid-Catalyzed Hydrolysis
3.0K
Hydrolysis of esters under acidic conditions proceeds through a nucleophilic acyl substitution. In the presence of excess water, the reaction proceeds in a reversible manner, forming carboxylic acids and alcohols.
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
During hydrolysis, the ester is first activated towards nucleophilic attack through the protonation of the carboxyl oxygen atom by the acid catalyst. The protonation makes the ester carbonyl carbon more electrophilic. In the next step, water acts as a nucleophile and adds to the...
3.0K
Polymer Classification: Architecture
2.8K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.8K
Free-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
Esters to Carboxylic Acids: Saponification
4.6K
Esters can be hydrolyzed to carboxylic acids under acidic or basic conditions. Base-promoted hydrolysis of esters is a nucleophilic acyl substitution reaction in which esters react with an aqueous base, followed by an acid to give carboxylic acids. This reaction is also known as saponification because it forms the basis for making soaps from fats.
The reaction requires a base in stoichiometric amounts, which participates in the reaction and is not regenerated later. So, the base acts as a...
The reaction requires a base in stoichiometric amounts, which participates in the reaction and is not regenerated later. So, the base acts as a...
4.6K
Alkylation of β-Diester Enolates: Malonic Ester Synthesis
3.4K
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
3.4K


