@article{Song:2017:10.1016/j.polymer.2017.04.058,
author = {Song, W and Barber, K and Lee, KY},
doi = {10.1016/j.polymer.2017.04.058},
journal = {Polymer},
pages = {97--106},
title = {Heat-induced bubble expansion as a route to increase the porosity of foam-templated bio-based macroporous polymers},
url = {http://dx.doi.org/10.1016/j.polymer.2017.04.058},
volume = {118},
year = {2017}
}

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TY  - JOUR
AB  - Macroporous polymers were prepared by mechanically frothing a bio-based epoxy resin and hardener mixture to first create air-in-resin liquid foams, followed by curing of these liquid foams. It was found that heating the air-in-resin liquid foams prior to their gelation decreased the viscosity of the resin mixture and increased the pressure of the air bubbles, leading to an isotropic expansion of the air bubbles. This resulted in an increase in the porosity of the resulting foam-templated macroporous polymers from 71% to 85%. Correspondingly, the compressive moduli (E) and strengths (σ) of the foam-templated macroporous polymers decreased from 231 MPa and 5.9 MPa, respectively, to 58 MPa and 1.9 MPa, respectively. This decrease is attributed to an increase in the porosity and pore throat frequency of the foam-templated macroporous polymers when heat was applied to the liquid foams. The deformation of the pores based on in situ SEM micro-compression test of the fabricated foam-templated macroporous polymers is also discussed.
AU  - Song,W
AU  - Barber,K
AU  - Lee,KY
DO  - 10.1016/j.polymer.2017.04.058
EP  - 106
PY  - 2017///
SN  - 0032-3861
SP  - 97
TI  - Heat-induced bubble expansion as a route to increase the porosity of foam-templated bio-based macroporous polymers
T2  - Polymer
UR  - http://dx.doi.org/10.1016/j.polymer.2017.04.058
UR  - http://hdl.handle.net/10044/1/49633
VL  - 118
ER  - 

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