The properties of SBS-g-VP copolymer membrane prepared by UV photografting without degassing

Yang, Jen‐Ming; Wang, M.C.; Hsu, Ying‐Gev; Chang, Chia-Wen

doi:10.1016/s0376-7388(96)00312-2

Cited by 34 publications

(14 citation statements)

References 17 publications

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“…[11][12][13][14][15] The membranes were immersed in distilled water. The wet weights (W w ) with different immersion times were determined by wiping off the surface water with a piece of filter paper.…”

Section: Measurement Of Water Absorption Contact Angle and The Calcumentioning

confidence: 99%

“…[7][8][9][10] Because graft polymerization is a time-consuming and expensive oxygen degassing process in industrial applications, we recently reported a method for graft polymerization of vinyl monomers onto styrenebutadiene-styrene triblock copolymer by UV radiation without degassing. [11][12][13][14][15] This process is economical because it does not involve the oxygen removal process.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of AA content on the contact angle and water absorption of the AA/ PU membrane was determined. By using our previous method [11][12][13][14][15] and the contact angle data, the surface energy of the AA/PU membrane was determined. In addition, the cytotoxicity test, as well as a cell adhesion and proliferation assay in cell culture, was conducted to evaluate the biocompatibility of the AA/PU membrane.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of poly(acrylic acid) modified polyurethane membrane for biomaterial by UV radiation without degassing

Yang

Huang

Yeh

1999

J. Biomed. Mater. Res.

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Poly(acrylic acid) modified polyurethane (AA/PU) membranes were prepared by UV radiation without degassing. The chemical composition of the AA/PU membrane was studied by IR spectroscopy. In addition to those absorption peaks associated with pure PU, the absorption peak at 2400 cm-1 of poly(AA) was also found. The morphology of AA/PU membrane was studied by optical polarizing microscopy. We also measured the glass transition temperature and the decomposition temperature of the AA/PU membrane by differential scanning calorimetry and thermogravimetric analysis. A significant domain was found in the AA/PU membrane, which resulted in different glass transition temperature and decomposition temperature between AA/PU and pure PU membrane. The effect of AA content on the contact angle and water absorption of the AA/PU membrane was determined. It was found that the water content of AA/PU membrane increased with increasing AA content, whereas the contact angle decreased. By using Kaeble's equation and the contact angle data, the surface free energy of AA/PU membrane was determined. The increase of surface free energy resulted from the increase of the dispersion (gammad) term and polar (gammap) term. In order to evaluate the biocompatibility of these membranes, a cytotoxicity test and a cell adhesion and proliferation assay were conducted in cell culture. Immortal cells and primary lymphocytes were both used in this study. The results showed that these AA/PU membranes exhibited very low cytotoxicity and could support cell adhesion and growth. An animal primary test was also done in this study. It was found that the AA/PU membrane could possibly be employed in the treatment of bowel defect.

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Section: Measurement Of Water Absorption Contact Angle and The Calcumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of poly(acrylic acid) modified polyurethane membrane for biomaterial by UV radiation without degassing

Yang

Huang

Yeh

1999

J. Biomed. Mater. Res.

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“…The blood compatibility of the modified SBS was measured by the Lee-White clotting test. 22,24 In our other papers, [25][26][27] we reported the grafting of vinyl pyridine (VP) and dimethyl amino ethyl methacrylate (DMAEMA) onto the membrane of SBS by UV photografting without degassing to prepare SBS-g-VP and SBS-g-DMAEMA membranes.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of heparin-containing SBS-g-DMAEMA copolymer membrane

Yang¹,

Jong²,

Hsu³

et al. 1998

J. Biomed. Mater. Res.

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The grafting of dimethyl amino ethyl methacrylate (DMAEMA) onto styrene-butadiene-styrene triblock copolymer (SBS) membrane was subsequently conducted by UV-radiation induced graft copolymerization without degassing to obtain the SBS-g-DMAEMA copolymer membrane. The substituted amino groups on the SBS-g-DMAEMA graft copolymer membrane were quaternized with iodomethane, and then the membrane was treated with heparin to prepare the heparin-containing SBS-g-DMAEMA copolymer membrane (SBS-g-DMAEMA-HEP). The graft copolymer membrane (SBS-g-DMAEMA) and the heparin-containing SBS-g-DMAEMA copolymer membrane (SBS-g-DMAEMA-HEP) were characterized by FTIR spectroscopy. The heparin content was determined by toluidine blue heparin assay. Contact angle, water content, and protein adsorption of fibrinogen and albumin experiments were also performed to evaluate the effect of graft amount and heparin content on the biocompatibility of SBS-g-DMAEMA and SBS-g-DMAEMA-HEP graft copolymer membranes. By using Kaelble's equation, the surface tension of SBS-g-DMAEMA and SBS-g-DMAEMA-HEP were determined. It was found that with increasing grafting amount and the heparin content, the surface tension and water content of SBS-g-DMAEMA membrane increased, whereas the contact angle decreased. The amount of the adsorption of albumin and fibrinogen decreased with increasing graft amount and heparin content. However, there was a minimum for adsorption of proteins in the SBS-g-DMAEMA and SBS-g-DMAEMA-HEP membranes.

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“…As a result, they have gained considerable attention in recent years. In our previous studies, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] the modifications of styrene-diene-styrene block copolymers and PU have been reported, and the evaluation of the performance of modified polymers has been studied.…”

Section: Introductionmentioning

confidence: 99%

Modification of HTPB‐based polyurethane with temperature‐sensitive poly(N‐isopropyl acrylamide) for biomaterial usage

Yang

Lin

et al. 2006

J Biomed Mater Res

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Abstract:Hydroxyl-terminated polybutadiene (HTPB)-based polyurethane with dimethyol propionic acid (DPA) as chain extender was synthesized by solution polymerization. The HTPBbased polyurethane was modified by UV radiation with N-isopropyl acrylamide monomer to get poly(N-isopropyl acrylamide)-modified polyurethane (PUDPANIPAAm). The cohesive energy (E coh ), molar volume (V), solubility parameter (␦), molecular weight (W M ), volume per gram (V g ), and the density (1/V g ) of PUDPANIPAAm were calculated by group contribution methods. To evaluate the application of PUDPANIPAAm for wound dressing and transplantation of cell sheet, the measurement of water content, water vapor transmission rate, and gas permeation on the PUDPANIPAAm membrane was evaluated. The biocompatibility of these membranes, cell adhesion, and proliferation assay were conducted in the cell culture. The effect of thermosensitivity of poly(N-isopropyl acrylamide) on cell detachment was also evaluated in the primary study. The results showed that these PUDPANIPAAm membranes are thermosensitive. The modification of PU with poly(N-isopropyl acrylamide) reduced the water vapor transmission rate and permeability of gas through PUDPANIPAAm membrane. PUDPANIPAAm membranes could support cell adhesion and growth. Owing to the thermosensitive nature of poly(N-isopropyl acrylamide), the relative cell numbers detached from PUDPANIPAAm membranes were larger than those detached from the polystyrene dish.

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The properties of SBS-g-VP copolymer membrane prepared by UV photografting without degassing

Cited by 34 publications

References 17 publications

Preparation of poly(acrylic acid) modified polyurethane membrane for biomaterial by UV radiation without degassing

Preparation of poly(acrylic acid) modified polyurethane membrane for biomaterial by UV radiation without degassing

Preparation and characterization of heparin-containing SBS-g-DMAEMA copolymer membrane

Modification of HTPB‐based polyurethane with temperature‐sensitive poly(N‐isopropyl acrylamide) for biomaterial usage

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