Preparation of polyvinyl alcohol hydrogel by twin-serew extrusion and its characterization

Kai Zheng; Ji Yu He; Dan Ping Chen; Rong Jie Yang

Preparation of polyvinyl alcohol hydrogel by twin-serew extrusion and its characterization

Kai Zheng^*, Ji Yu He, Dan Ping Chen, Rong Jie Yang

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

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

2 Citations (Scopus)

Abstract

Two kinds of polyvinyl alcohol (PVA) hydrogels (40wt% PVA) were prepared by twin-screw extruder and following repetitively freezing-thawing processes. Static and dynamic mechanical performances were measured by Instron-6022 tensile equipment and DMTA V dynamic thermoanalysis equipment. It is obtained that, firstly, the PVA hydrogels by extrusion have higher tensile strength than PVA hydrogels by the solution casting method. The tensile strength and elastic modulus of PVA/H₂O gel are lower than that of PVA/DMSO/H₂O gel. The effective cross-linking density (v_e) and the molecular mass between crosslinking points (M_c) were calculated. Dynamic mechanical behaviors of the two kinds of PVA/H₂O and PVA/DMSO/H₂O were discussed. The two hydrogels showed different transition processes with temperature.

Original language	English
Pages (from-to)	189-192
Number of pages	4
Journal	Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering
Volume	22
Issue number	5
Publication status	Published - Sept 2006

Keywords

Dynamic mechanical behavior
Hydrogel
Polyvinyl alcohol
Twin-screw extrusion

Cite this

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title = "Preparation of polyvinyl alcohol hydrogel by twin-serew extrusion and its characterization",

abstract = "Two kinds of polyvinyl alcohol (PVA) hydrogels (40wt% PVA) were prepared by twin-screw extruder and following repetitively freezing-thawing processes. Static and dynamic mechanical performances were measured by Instron-6022 tensile equipment and DMTA V dynamic thermoanalysis equipment. It is obtained that, firstly, the PVA hydrogels by extrusion have higher tensile strength than PVA hydrogels by the solution casting method. The tensile strength and elastic modulus of PVA/H2O gel are lower than that of PVA/DMSO/H2O gel. The effective cross-linking density (ve) and the molecular mass between crosslinking points (Mc) were calculated. Dynamic mechanical behaviors of the two kinds of PVA/H2O and PVA/DMSO/H2O were discussed. The two hydrogels showed different transition processes with temperature.",

keywords = "Dynamic mechanical behavior, Hydrogel, Polyvinyl alcohol, Twin-screw extrusion",

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T1 - Preparation of polyvinyl alcohol hydrogel by twin-serew extrusion and its characterization

AU - Zheng, Kai

AU - He, Ji Yu

AU - Chen, Dan Ping

AU - Yang, Rong Jie

PY - 2006/9

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AB - Two kinds of polyvinyl alcohol (PVA) hydrogels (40wt% PVA) were prepared by twin-screw extruder and following repetitively freezing-thawing processes. Static and dynamic mechanical performances were measured by Instron-6022 tensile equipment and DMTA V dynamic thermoanalysis equipment. It is obtained that, firstly, the PVA hydrogels by extrusion have higher tensile strength than PVA hydrogels by the solution casting method. The tensile strength and elastic modulus of PVA/H2O gel are lower than that of PVA/DMSO/H2O gel. The effective cross-linking density (ve) and the molecular mass between crosslinking points (Mc) were calculated. Dynamic mechanical behaviors of the two kinds of PVA/H2O and PVA/DMSO/H2O were discussed. The two hydrogels showed different transition processes with temperature.

KW - Dynamic mechanical behavior

KW - Hydrogel

KW - Polyvinyl alcohol

KW - Twin-screw extrusion

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JF - Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering

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Preparation of polyvinyl alcohol hydrogel by twin-serew extrusion and its characterization

Abstract

Keywords

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