DOI: 10.1002/pi.4980040603. Structure and permeability of porous films of poly(hydroxy ethyl methacrylate)

Structure and permeability of porous films of poly(hydroxy ethyl methacrylate)

10.1002/pi.4980040603

Crossref journal-article

Wiley

British Polymer Journal (311)

Abstract

AbstractPorous films of poly(hydroxy ethyl methacrylate) have been made by photo‐polymerisation of solutions of the monomer. The permeability of homogeneous films depends on the cross‐link density and the concentration and composition of the polymerisation solvent. A membrane of minimum water permeability, in which the transport mechanism is principally diffusion, results from a cross‐link concentration of ∼9.4 mol‐% and a monomer concentration of ∼75% in an aqueous ethylene glycol solvent (20% ethylene glycol).More porous (macroporous) films were prepared by first cooling the solution such that the solvent freezes and the monomer occupies the interstices between the solvent crystals. After polymerisation and removal of the solvent, a porous structure results. The rate of freezing, the profile of the thermal gradient, and the solvent and crosslinker concentrations control the permeability of this film. Slow cooling gives random pores (K ≃6 × 10−15 cm2), but rapid, directional cooling from one face gives oriented pores with K ≃10−12 cm2. A 6‐order change in K results from varying the monomer concentration from 40 to 85% in a 4:1 water: ethylene glycol solvent, and a 3‐order change from increasing the ethylene glycol content of the solvent from 0 to 40% at a fixed monomer concentration.

Bibliography

Haldon, R. A., & Lee, B. E. (1972). Structure and permeability of porous films of poly(hydroxy ethyl methacrylate). British Polymer Journal, 4(6), 491â501. Portico.

Authors 2

R. A. Haldon (first)
B. E. Lee (additional)

References 8 Referenced 46

10.1002/app.1970.070140519
10.1002/macp.1968.021180102
10.1002/app.1965.070091019
10.1016/0095-8522(65)90073-5
10.1007/BF00660126
10.1021/cr60061a001
South African Patent 68/4578.
{'key': 'e_1_2_1_9_2', 'first-page': '188', 'volume-title': 'Solvents Manual', 'author': 'Marsden C.', 'year': '1954'} / Solvents Manual by Marsden C. (1954)

Dates

Type	When
Created	18 years, 4 months ago (March 27, 2007, 2:33 a.m.)
Deposited	1 year, 9 months ago (Nov. 22, 2023, 8:42 p.m.)
Indexed	2 days, 7 hours ago (Aug. 21, 2025, 12:37 p.m.)
Issued	52 years, 9 months ago (Nov. 1, 1972)
Published	52 years, 9 months ago (Nov. 1, 1972)
Published Online	18 years, 5 months ago (Feb. 26, 2007)
Published Print	52 years, 9 months ago (Nov. 1, 1972)

Funders 0

None

BibTeX

@article{Haldon_1972, title={Structure and permeability of porous films of poly(hydroxy ethyl methacrylate)}, volume={4}, ISSN={1934-256X}, url={http://dx.doi.org/10.1002/pi.4980040603}, DOI={10.1002/pi.4980040603}, number={6}, journal={British Polymer Journal}, publisher={Wiley}, author={Haldon, R. A. and Lee, B. E.}, year={1972}, month=nov, pages={491–501} }

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