Natural rubber latex blended polystyrene emulsion for dipping products: preparation and properties
Deproteinized natural rubber latex (DPNR) was prepared using KAO protease enzyme to digest proteins from natural rubber low ammonia concentrated latex (NR-LA). Polystyrene latex (PS) was synthesized by emulsion polymerization technique for blending with natural rubber. The maximum fraction of PS ble...
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| Format: | Article |
| Language: | English |
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Prince of Songkla University
2004-05-01
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| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | http://www.sjst.psu.ac.th/journal/26-4pdf/15-rubber-latex.pdf |
| _version_ | 1828418890797940736 |
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| author | Kovuttikulrangsie, S. Khongkot, T. |
| author_facet | Kovuttikulrangsie, S. Khongkot, T. |
| author_sort | Kovuttikulrangsie, S. |
| collection | DOAJ |
| description | Deproteinized natural rubber latex (DPNR) was prepared using KAO protease enzyme to digest proteins from natural rubber low ammonia concentrated latex (NR-LA). Polystyrene latex (PS) was synthesized by emulsion polymerization technique for blending with natural rubber. The maximum fraction of PS blended NR-LA or DPNR used to obtain a homogenous film was 20% w/w. The 300% modulus of PS blended NR film was increased before and after aging at 100ºC for 22 hrs. The tensile strength and elongation at break were increased at NR/PS = 95/5 w/w and tended to decrease as PS blended fraction increased. DPNR films had a lower friction coefficient than NR-LA films. PS blended NR-LA or DPNR would decrease the friction coefficient of films. The rubber-surfaced friction is reduced. The extractable protein of NR-LA film was higher than 200 μg/g whereas that of DPNR film was lower than 50 μg/g. PS blended NR-LA and DPNR could reduce the extractable protein to less than 60 μg/g and 30μg/g, respectively. The physical properties of PS blended NR-LA met ASTM D3577 and ASTM D3578 standards for dipping products of surgical gloves and examination gloves at the maximum fraction of PS 15% w/w and 20% w/w, respectively, whereas PS blended DPNR only met ASTM D3577 standard at the maximum fraction of PS < 5% w/w. |
| first_indexed | 2024-12-10T14:44:59Z |
| format | Article |
| id | doaj.art-c728aa866a4c4d2f82523d13b84c2a46 |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-12-10T14:44:59Z |
| publishDate | 2004-05-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-c728aa866a4c4d2f82523d13b84c2a462022-12-22T01:44:36ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952004-05-01264577593Natural rubber latex blended polystyrene emulsion for dipping products: preparation and propertiesKovuttikulrangsie, S.Khongkot, T.Deproteinized natural rubber latex (DPNR) was prepared using KAO protease enzyme to digest proteins from natural rubber low ammonia concentrated latex (NR-LA). Polystyrene latex (PS) was synthesized by emulsion polymerization technique for blending with natural rubber. The maximum fraction of PS blended NR-LA or DPNR used to obtain a homogenous film was 20% w/w. The 300% modulus of PS blended NR film was increased before and after aging at 100ºC for 22 hrs. The tensile strength and elongation at break were increased at NR/PS = 95/5 w/w and tended to decrease as PS blended fraction increased. DPNR films had a lower friction coefficient than NR-LA films. PS blended NR-LA or DPNR would decrease the friction coefficient of films. The rubber-surfaced friction is reduced. The extractable protein of NR-LA film was higher than 200 μg/g whereas that of DPNR film was lower than 50 μg/g. PS blended NR-LA and DPNR could reduce the extractable protein to less than 60 μg/g and 30μg/g, respectively. The physical properties of PS blended NR-LA met ASTM D3577 and ASTM D3578 standards for dipping products of surgical gloves and examination gloves at the maximum fraction of PS 15% w/w and 20% w/w, respectively, whereas PS blended DPNR only met ASTM D3577 standard at the maximum fraction of PS < 5% w/w.http://www.sjst.psu.ac.th/journal/26-4pdf/15-rubber-latex.pdfNRlatexdeproteinized natural rubberpolystyreneblendfilm |
| spellingShingle | Kovuttikulrangsie, S. Khongkot, T. Natural rubber latex blended polystyrene emulsion for dipping products: preparation and properties Songklanakarin Journal of Science and Technology (SJST) NR latex deproteinized natural rubber polystyrene blend film |
| title | Natural rubber latex blended polystyrene emulsion for dipping products: preparation and properties |
| title_full | Natural rubber latex blended polystyrene emulsion for dipping products: preparation and properties |
| title_fullStr | Natural rubber latex blended polystyrene emulsion for dipping products: preparation and properties |
| title_full_unstemmed | Natural rubber latex blended polystyrene emulsion for dipping products: preparation and properties |
| title_short | Natural rubber latex blended polystyrene emulsion for dipping products: preparation and properties |
| title_sort | natural rubber latex blended polystyrene emulsion for dipping products preparation and properties |
| topic | NR latex deproteinized natural rubber polystyrene blend film |
| url | http://www.sjst.psu.ac.th/journal/26-4pdf/15-rubber-latex.pdf |
| work_keys_str_mv | AT kovuttikulrangsies naturalrubberlatexblendedpolystyreneemulsionfordippingproductspreparationandproperties AT khongkott naturalrubberlatexblendedpolystyreneemulsionfordippingproductspreparationandproperties |