LPPI

Polymers, Polymer Networks and interpenetrated polymer networks

Almost every materials developed correspond to the combination of compounds that are generally thermodynamically incompatible. Thus, the architecture of interpenetrated networks of polymers is the only way to develop a mixture of two polymers that is stable over time. It corresponds to the combination of crosslinked polymers, at least one of which is synthesized in the presence of the other. These various pathways of synthesis are schematized below:

One of the objectives is to combine within a material the different properties of the associated partners while blurring the weaknesses of each. RIPs are stable dimensionally over time and may have improved properties of resistance to chemical and physical aging.

 

Some associations made:

In order to understand and control the phases separation mechanisms that play a crucial role on the properties of the final material, the laboratory also realize and studies such structures from micro-emulsion but also from 2D systems formed at the interface air – water or developed as thin film. Under these conditions, the interface phenomenon become more important and therefore easier to characterize. We have thus demonstrated that synthesis at the air/water interface leads to the formation of 2D semi-interpenetrated networks without phases separation, with partners as different as polydimethylsiloxane (PDMS) and cellulose aceto-butyrate. (A.El Haitami and all. 2015, 2014 )

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