Chemically induced phase separation in the preparation of porous epoxy monolith

2010 ◽  
Vol 48 (20) ◽  
pp. 2140-2147 ◽  
Author(s):  
Jianhua Li ◽  
Zhongjie Du ◽  
Hangquan Li ◽  
Chen Zhang
Keyword(s):  
Phase Separation ◽  
Chemically Induced

Porous epoxy monolith prepared via chemically induced phase separation

Polymer ◽  
2009 ◽  
Vol 50 (6) ◽  
pp. 1526-1532 ◽  
Author(s):  
Jianhua Li ◽  
Zhongjie Du ◽  
Hangquan Li ◽  
Chen Zhang
Keyword(s):  
Phase Separation ◽  
Chemically Induced

Nanoporous Polycyanurates Created by Chemically-Induced Phase Separation: Structure-Property Relationships

2014 ◽  
Vol 341 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Olga Grigoryeva ◽  
Alexander Fainleib ◽  
Kristina Gusakova ◽  
Olga Starostenko ◽  
Jean-Marc Saiter ◽  
...  
Keyword(s):  
Phase Separation ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Chemically Induced

Preparation of porous crosslinked polymers with different surface morphologies via chemically induced phase separation

2011 ◽  
Vol 49 (14) ◽  
pp. 1022-1030 ◽  
Author(s):  
Yu-Shun Luo ◽  
Kuo-Chung Cheng ◽  
Nan-Du Huang ◽  
Wen-Pang Chiang ◽  
Shun-Fu Li
Keyword(s):  
Phase Separation ◽  
Crosslinked Polymers ◽  
Chemically Induced ◽  
Surface Morphologies

Macroporous Thermosets via Chemically Induced Phase Separation

1996 ◽  
Vol 431 ◽  
Author(s):  
J. Kiefer ◽  
R. Porouchani ◽  
D. Mendels ◽  
J. B. Ferrer ◽  
C. Fond ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
New Technology ◽  
Curing Temperature ◽  
Low Molecular Weight ◽  
Closed Cell ◽  
Chemically Induced

AbstractWe have explored a new technology based on chemically induced phase separation that yields porous epoxies and cyanurates with a closed cell morphology and micrometer sized pores with a narrow pore size distribution. When the precursor monomers are cured in the presence of a low molecular weight liquid, the desired morphology results from a phase separation and a chemical quench. After phase separation, the porosity is achieved by thermal removal of the secondary liquid phase, specifically by diffusion through the crosslinked matrix. In respect to the thermodynamics and kinetics, the origin of the phase separation process can be identified as nucleation and growth. The influence of internal and external reaction parameters, such as chemical nature of the low molecular weight liquid, its concentration and the curing temperature on the final morphology are presented. Thus, the morphology can be controlled ranging from a monomodal to bimodal pore size distribution with pore sizes inbetween 1 to 10 μm. These porous thermosets are characterized by a significantly lower density, without any loss in thermal stability compared to the neat matrix. Such new materials demonstrate great interest for lowering the dielectric constant and for improving the fundamental understanding of the role of voids in stress relaxation and toughening.

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