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Erschienen in: Journal of Polymer Research 11/2019

01.11.2019 | ORIGINAL PAPER

Preparation, characterization and application of polyether and long-chain alkyl co-modified polydimethylsiloxane

verfasst von: Kangyu Fu, Mengyao Xu, Rui Zhong, Zhenglong Yang, An’an Zhou

Erschienen in: Journal of Polymer Research | Ausgabe 11/2019

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Abstract

In this paper, by using a self-made hydrogen-containing polymethylhydrogensiloxane having a hydrogen content of 0.20%, a polyether of F-6 and α-olefin having a carbon chain length of even numbers in 6–18 as main raw materials, polyether and long-chain alkyl co-modified polydimethylsiloxane having different molecular structures were successfully prepared via hydrosilylation reactions. 1H-NMR, TGA, DLS, fluorescence spectroscopy and surface tension measurements were used to characterize their structures and properties. The results shows that when the molar ratio of polyether to α-olefin is 5:1, an emulsion type anti-foaming agent with polyether and long-chain alkyl co-modified polydimethylsiloxane as active ingredient was successfully prepared, it basically maintains 90% quality at 300 °C, indicating good heat resistance, and the critical micelle concentration (CMC) of polyether and long-chain alkyl co-modified polydimethylsiloxane is 8.55 mg/L. The surfactant has good dilution stability compared to other small molecule. When the hydrophilic-lipophilic balance (HLB) is equal to 10, the compound emulsifier is made of Span 80 and Tween 80, the emulsification method is a phase inversion method, and the obtained emulsion has the smallest particle size and an average particle diameter of 134.4 nm, the emulsion shows good stability and uniformity, and the particle size distribution is narrow. In summary, the polyether and long-chain alkyl co-modified polydimethylsiloxane synthesized in this work have potential applications in the fields of anti-foaming agent.

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Metadaten
Titel
Preparation, characterization and application of polyether and long-chain alkyl co-modified polydimethylsiloxane
verfasst von
Kangyu Fu
Mengyao Xu
Rui Zhong
Zhenglong Yang
An’an Zhou
Publikationsdatum
01.11.2019
Verlag
Springer Netherlands
Erschienen in
Journal of Polymer Research / Ausgabe 11/2019
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI
https://doi.org/10.1007/s10965-019-1928-9

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