Jonas Elsing

Foamed Styrene-in-Water Emulsions as Template for Highly Ordered Polystyrene Foams


Front	Back

ISBN:

978-3-8440-5264-0

Series:

Chemie

Keywords:

foam templating; microfluidics; polystyrene foams; monodisperse; polymer foams

Type of publication:

Thesis

Language:

English

Pages:

140 pages

Figures:

80 figures

Weight:

195 g

Format:

21 x 14,8 cm

Bindung:

Paperback

Price:

45,80 € / 57,30 SFr

Published:

June 2017

Buy:

Download:

Available PDF-Files for this title:

You need the Adobe Reader, to open the files. Here you get help and information, for the download.

These files are not printable.


	Document		Document
	Type		PDF
	Costs		34,35 EUR
	Action		Purchase in obligation and display of file - 3,6 MB (3742672 Byte)
	Action		Purchase in obligation and download of file - 3,6 MB (3742672 Byte)


	Document		Table of contents
	Type		PDF
	Costs		free
	Action		Display of file - 91 kB (93462 Byte)
	Action		Download of file - 91 kB (93462 Byte)

User settings for registered users

You can change your address here or download your paid documents again.

User:	Not logged in.
Actions:	Login / Register Forgotten your password?

Recommendation:

You want to recommend this title?

Review copy:

Here you can order a review copy.

Link:

You want to link this page? Click here.

Export citations:

Text
BibTex
RIS

Abstract:

The aim of this work was the synthesis and characterization of highly ordered, monodisperse polystyrene foams. The method of choice to achieve this aim was the combination of foamed emulsion templating and microfluidic foam production. First a concentrated styrene-in-water emulsion was foamed by means of microfluidics to produce a highly ordered, monodisperse liquid foam template which was then polymerized under VIS-light to obtain a solid polystyrene foam. This strategy allows specifically tuning the bubble size and liquid fraction of the template and consequently the pore size and density of the resulting polystyrene foam. By investigating the morphology of the polystyrene foams, we found that the pores are interconnected by windows - regardless of bubble size and liquid fraction of the template. The pore walls of the polystyrene foams were found to be porous, which is a direct result of the polymerization of the emulsion. The porous pore walls also influence the mechanical properties of the polystyrene foam. While the relation between the relative density and the Young's modulus and shear modulus, respectively, were found to be the same as described by various models, the actual values of the moduli were found to be smaller. The factor by which the moduli are lower is directly connected to the additional porosity and the models were altered accordingly.