Swelling behaviors, tensile properties and thermodynamic interactions in APS/HEMA copolymeric hydrogels

Zhihui Lin; Wenhui Wu; Jianquan Wang; Xin Jin

doi:10.1007/s11706-007-0078-x

Swelling behaviors, tensile properties and thermodynamic interactions in APS/HEMA copolymeric hydrogels

Zhihui Lin, Wenhui Wu^*, Jianquan Wang, Xin Jin

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

A series of hydrogels was synthesized from hydrophobic allyl phenyl sulfone (APS) and hydrophilic 2-hydroxyethyl methacrylate (HEMA) by bulk free radical copolymerization. The effects of APS content and temperature were studied on network parameters such as effective crosslink density (v _e), molar mass between crosslinks (M _c) and polymer-water interaction parameter (x) of hydrogels. The increase in APS content was shown to enhance hydrophobic bonding within hydrogel, leading to the decrease in equilibrium water content (EWC) and the increase in volume fraction of polymer in hydrogel (θ₂), tensile strength and Young's modulus. At the same time, the increases in v _e and x and the decrease in M _c were also observed. When the temperature is increased from 273 to 343 K, the hydrogel A/H3 undergoes decreasing in EWC and increasing in θ₂ and x values. The thermody namic analysis indicated that the swelling process is an exothermic process.

Original language	English
Pages (from-to)	427-431
Number of pages	5
Journal	Frontiers of Materials Science in China
Volume	1
Issue number	4
DOIs	https://doi.org/10.1007/s11706-007-0078-x
Publication status	Published - Oct 2007

Keywords

Effective crosslink density
Hydrogels
Interaction parameter
Swelling behavior
Tensile properties

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10.1007/s11706-007-0078-x

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title = "Swelling behaviors, tensile properties and thermodynamic interactions in APS/HEMA copolymeric hydrogels",

abstract = "A series of hydrogels was synthesized from hydrophobic allyl phenyl sulfone (APS) and hydrophilic 2-hydroxyethyl methacrylate (HEMA) by bulk free radical copolymerization. The effects of APS content and temperature were studied on network parameters such as effective crosslink density (v e), molar mass between crosslinks (M c) and polymer-water interaction parameter (x) of hydrogels. The increase in APS content was shown to enhance hydrophobic bonding within hydrogel, leading to the decrease in equilibrium water content (EWC) and the increase in volume fraction of polymer in hydrogel (θ2), tensile strength and Young's modulus. At the same time, the increases in v e and x and the decrease in M c were also observed. When the temperature is increased from 273 to 343 K, the hydrogel A/H3 undergoes decreasing in EWC and increasing in θ2 and x values. The thermody namic analysis indicated that the swelling process is an exothermic process.",

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T1 - Swelling behaviors, tensile properties and thermodynamic interactions in APS/HEMA copolymeric hydrogels

AU - Lin, Zhihui

AU - Wu, Wenhui

AU - Wang, Jianquan

AU - Jin, Xin

PY - 2007/10

Y1 - 2007/10

N2 - A series of hydrogels was synthesized from hydrophobic allyl phenyl sulfone (APS) and hydrophilic 2-hydroxyethyl methacrylate (HEMA) by bulk free radical copolymerization. The effects of APS content and temperature were studied on network parameters such as effective crosslink density (v e), molar mass between crosslinks (M c) and polymer-water interaction parameter (x) of hydrogels. The increase in APS content was shown to enhance hydrophobic bonding within hydrogel, leading to the decrease in equilibrium water content (EWC) and the increase in volume fraction of polymer in hydrogel (θ2), tensile strength and Young's modulus. At the same time, the increases in v e and x and the decrease in M c were also observed. When the temperature is increased from 273 to 343 K, the hydrogel A/H3 undergoes decreasing in EWC and increasing in θ2 and x values. The thermody namic analysis indicated that the swelling process is an exothermic process.

AB - A series of hydrogels was synthesized from hydrophobic allyl phenyl sulfone (APS) and hydrophilic 2-hydroxyethyl methacrylate (HEMA) by bulk free radical copolymerization. The effects of APS content and temperature were studied on network parameters such as effective crosslink density (v e), molar mass between crosslinks (M c) and polymer-water interaction parameter (x) of hydrogels. The increase in APS content was shown to enhance hydrophobic bonding within hydrogel, leading to the decrease in equilibrium water content (EWC) and the increase in volume fraction of polymer in hydrogel (θ2), tensile strength and Young's modulus. At the same time, the increases in v e and x and the decrease in M c were also observed. When the temperature is increased from 273 to 343 K, the hydrogel A/H3 undergoes decreasing in EWC and increasing in θ2 and x values. The thermody namic analysis indicated that the swelling process is an exothermic process.

KW - Effective crosslink density

KW - Hydrogels

KW - Interaction parameter

KW - Swelling behavior

KW - Tensile properties

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JO - Frontiers of Materials Science in China

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ER -

Swelling behaviors, tensile properties and thermodynamic interactions in APS/HEMA copolymeric hydrogels

Abstract

Keywords

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