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Block PEG active macromonomer as well as preparation method and application thereof
The invention provides a block PEG active macromonomer and application thereof. The active macromonomer has a structural formula as shown in formula I, wherein in the formula I, A or n is an integer between 15 and 120; R is n-butyl, isobutyl, n-amyl or isoamyl; and x is an integer between 10 and 80. The polycarboxylate superplasticizer synthesized by the block PEG active macromonomer can increase the flowability of concrete, reduce the resistance among hydrated particles and reduce the viscosity of the concrete; on the other hand, due to the existence of a large number of hydrophobic groups, the polycarboxylate superplasticizer is endowed with a certain air entraining effect, introduced bubbles are uniform and stable, the workability of concrete is improved, and the concrete strength is improved.
本发明提供一种嵌段PEG活性大单体及其应用，所述活性大单体的结构式如式Ⅰ所示，其中，A为或者n为15～120之间的整数；R为正丁基、异丁基、正戊基或异戊基；x为10～80之间的整数。本发明的嵌段PEG活性大单体合成的聚羧酸减水剂可以增加混凝土的流动性，同时降低水化颗粒之间的阻力，降低混凝土的粘度，另一方面，由于大量疏水性基团的存在，赋予聚羧酸减水剂一定的引气作用，且引入的气泡均匀稳定，改善混凝土的和易性，提高混凝土强度。
Block PEG active macromonomer as well as preparation method and application thereof
The invention provides a block PEG active macromonomer and application thereof. The active macromonomer has a structural formula as shown in formula I, wherein in the formula I, A or n is an integer between 15 and 120; R is n-butyl, isobutyl, n-amyl or isoamyl; and x is an integer between 10 and 80. The polycarboxylate superplasticizer synthesized by the block PEG active macromonomer can increase the flowability of concrete, reduce the resistance among hydrated particles and reduce the viscosity of the concrete; on the other hand, due to the existence of a large number of hydrophobic groups, the polycarboxylate superplasticizer is endowed with a certain air entraining effect, introduced bubbles are uniform and stable, the workability of concrete is improved, and the concrete strength is improved.
本发明提供一种嵌段PEG活性大单体及其应用，所述活性大单体的结构式如式Ⅰ所示，其中，A为或者n为15～120之间的整数；R为正丁基、异丁基、正戊基或异戊基；x为10～80之间的整数。本发明的嵌段PEG活性大单体合成的聚羧酸减水剂可以增加混凝土的流动性，同时降低水化颗粒之间的阻力，降低混凝土的粘度，另一方面，由于大量疏水性基团的存在，赋予聚羧酸减水剂一定的引气作用，且引入的气泡均匀稳定，改善混凝土的和易性，提高混凝土强度。
Block PEG active macromonomer as well as preparation method and application thereof
一种嵌段PEG活性大单体及其制备方法和应用
ZHANG XIAOFU (author) / BAI SHUYING (author) / ZHAO LIHUA (author)
2021-05-07
Patent
Electronic Resource
Chinese
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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