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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 4, Number 4
BKCSDE 4(4)
April 20, 1983 

 
Title
The Swelling and Mechanical Properties of Hydrogels of Tactic Poly (2-Hydroxyethyl Methacrylate)
Author
Joong Whan Lee, Eul Hwan Kim, Mu Shik Jhon
Keywords
Abstract
The swelling and stress-elongation experiments have been performed for two kinds of gels of tactic poly (2-hydroxyethyl methacrylate) (P-HEMA) with varying crosslinker concentrations. The gels of isotactic and syndiotactic P-HEMA were swollen in aqueous salt solutions upon varying molal concentrations. The solute used were NaCl, MgCl2, Na2SO4, MgSO4 and urea. The water content at equilibrium swelling and the salt partition coefficient were determined, and stress-elongation curves of the gels were obtained. From these results, the effective number of chain (νe) and the Flory-Huggins interaction parameter (χ1) were also obtained. The swelling experiment was also performed under varying solvents and the degree of swelling was determined. The solubility parameter of P-HEMA was obtained as 13.4 (cal/mole)l/2 using the correlation between the degree of swelling and the solubility parameter (δ1) of solvents. The mechanical properties of syndiotactic P-HEMA is stronger than that of isotactic P-HEMA, and the water content of both gels become smaller when the crosslinking increases. Isotactic P-HEMA contains more water content than syndiotactic P-HEMA does.
Page
162 - 169
Full Text
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