Modified styrene‐diene‐styrene triblock copolymers for oxygen permeation

Yang, Jen‐Ming; Hsiue, Ging‐Ho

doi:10.1002/apmc.1995.052310101

Cited by 9 publications

(1 citation statement)

References 13 publications

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“…Ikada et al1–8 reported on a series of studies of the surface modification of polymers for medical applications by graft polymerization methods. In our previous studies,9–15 the grafting of various vinyl monomers onto a membrane of thermoplastic rubber by the γ‐ray irradiation method was reported. Because graft polymerization is a time‐consuming and expensive oxygen degassing process in industrial applications, Uchida et al16, 17 reported on a method for surface graft polymerization of ionic monomer onto poly(ethylene terephthalate) by ultraviolet irradiation without degassing.…”

Section: Introductionmentioning

confidence: 99%

Wettability and antibacterial assessment of chitosan containing radiation‐induced graft nonwoven fabric of polypropylene‐g‐acrylic acid

Yang

Lin

et al. 2003

J of Applied Polymer Sci

103

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ABSTRACT:The grafting of acrylic acid (AA) onto polypropylene (PP) nonwoven fabric was induced by ␥-ray irradiation without degassing to obtain PP-g-AA-modified nonwoven fabric. Chitosan was immobilized onto the PP-g-AA-modified nonwoven fabric with 1-ethyl-3-(3-dimethyamino propyl) carbidiimide to get the chitosan-containing PP-g-AA-modified nonwoven fabric. The PP-g-AA-modified nonwoven fabrics were characterized by IR spectroscopy. In addition to the absorption peaks associated with pure PP nonwoven fabric, absorption peaks at 1700 cm Ϫ1 (CAO) and at about 2950 cm Ϫ1 for the COOH group were also found for the PP-g-AA-modified nonwoven fabric. The chitosan-containing PP-g-AA nonwoven fabric obtained had an absorption peak at about 1475-1580 cm Ϫ1 (COONH), in addition to those of the PP-g-AA nonwoven fabric. The effects of acrylic acid grafting content and chitosan on the wettability and antibacterial assessment were investigated. The wicking time of water on the PP-g-AA-modified nonwoven fabric decreased with increasing acrylic acid grafting content and chitosan, whereas the water content on the PP-g-AA-modified nonwoven fabric increased. Because the concentration of Pseudomonas aeruginosa on the PP-g-AAmodified nonwoven fabric decreased with increasing acrylic acid grafting content and chitosan, it means that the antibacterial activity of the PP nonwoven fabric was enhanced by the modification of ␥-ray radiation-induced grafting of acrylic acid and the immobilization of chitosan onto the PP-g-AA-modified nonwoven fabric.

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Section: Introductionmentioning

confidence: 99%

Wettability and antibacterial assessment of chitosan containing radiation‐induced graft nonwoven fabric of polypropylene‐g‐acrylic acid

Yang

Lin

et al. 2003

J of Applied Polymer Sci

103

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Radiation-induced graft copolymer SBS-g-VP for biomaterial usage

Yang

Hsiue

1996

J. Biomed. Mater. Res.

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The grafting of 4-vinyl pyridine (VP) to styrene-butadienestyrene triblock copolymer (SBS) by radiation-induced graft copolymerization was studied. The cohesive properties such as cohesive energy (Ecoh), molar volume (V), solubility parameter (delta), molar molecular weight (WM), specific volume (Vg), and density (1/Vg) of SBS-g-VP graft copolymer were calculated according to the group contribution of Fedors. The morphology of SBS-g-VP was studied by optical polarizing microscopy. We also measured the glass transition temperature and the mechanical properties of SBS-g-VP graft copolymer. Contact angle and blood-clotting time experiments were also performed to evaluate the biocompatibility of SBS-g-VP. A second domain was found in the SBS-g-VP graft copolymer, which resulted in different properties between SBS-g-VP and SBS. The blood compatibility of SBS-g-VP as measured by the Lee-White clotting test was better than that of SBS and polystyrene.

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Graft copolymerization ofN‐isopropylacrylamide on styrene‐butadiene‐styrene block copolymer

Lee

Chen

2001

J of Applied Polymer Sci

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Graft polymerization of N-isopropylacrylamide (NIPAAm) onto styrenebutadiene-styrene (SBS) block copolymer using benzoyl peroxide was studied to improve the water absorptivity and thermosensitivity of SBS. The influence of various grafting reaction factors on the conversion of NIPAAm and the grafting percentage of SBS-g-NIPAAm were also investigated in the study. The experimental results showed that the conversion of SBS-g-NIPAAm was enhanced as the monomers of NIPAAm were increased. The maximum conversion of SBS-g-NIPAAm was observed when the molar ratio of NIPAAm to butadiene was 1.25. In addition, increasing the reaction time enhanced the conversion of SBS-g-NIPAAm; the maximum grafting percentage was obtained with a 4-h reaction. The optimal concentration of the initiator was 3 ϫ 10 Ϫ4 mol/20 mL of toluene, and the grafting reaction occurred at over 65°C. The test results of the hydrophilicity of the grafted membranes showed that the hydrophilicity and thermosensitivity were significantly enhanced by grafting NIPAAm onto SBS.

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Modified styrene‐diene‐styrene triblock copolymers for oxygen permeation

Cited by 9 publications

References 13 publications

Wettability and antibacterial assessment of chitosan containing radiation‐induced graft nonwoven fabric of polypropylene‐g‐acrylic acid

Wettability and antibacterial assessment of chitosan containing radiation‐induced graft nonwoven fabric of polypropylene‐g‐acrylic acid

Radiation-induced graft copolymer SBS-g-VP for biomaterial usage

Graft copolymerization ofN‐isopropylacrylamide on styrene‐butadiene‐styrene block copolymer

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