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頁籤選單縮合
題名 | 義齒床用壓克力樹脂機械性質之改良研究=Study on the Improvement of Mechanical Properties of Denture Base Acrylic Resin |
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作者 | 陳三餘; 劉奕祥; 梁文敏; Chen, San-yue; Liu, Yi-shiang; Liang, Wen-miin; |
期刊 | 中華牙醫學雜誌 |
出版日期 | 19990600 |
卷期 | 18:2 1999.06[民88.06] |
頁次 | 頁121-130 |
分類號 | 416.98 |
語文 | chi |
關鍵詞 | 壓克力樹脂強化材料; 撞擊強度; 彎曲強度; 諾氏硬度; Acrylic resin; Impact strength; Bening strength; Knoop hardness; |
中文摘要 | 為求改善義齒床用壓克力脂之機械性質,本實驗選用環氧樹脂、聚酯樹脂及玻璃 纖維分別作為強化材料。實驗步驟為:首先依廠商指示將壓克力樹脂、環氧樹脂、聚酯樹脂 各自作成 70mm 長× 25mm 寬× 15mm 厚之試樣塊,再依 ASTM256 號及 ISO1567 號規格所 述之方法分別製作測試撞擊強度及彎曲強度所需之試樣,測試過之撞擊強度試樣再用來測諾 氏硬度。 其次將壓克力樹脂分別與環氧樹脂或聚酯樹脂以 2:1,1:1,1:2 之重量比相混合 後,依前法製作及測試試樣。最後再將長 6mm 之玻璃纖維 1wt% 至 3wt %分別添加於前項各種不同條件之樹脂混合液中並依同法製作及測試。各個步驟的結果 分別以單因子變異數分析法及Scheffe's事後檢定法進行統計分析處理。實驗結果為: (1)壓克力樹脂、環氧樹脂及聚酯樹脂中以壓克力樹脂之彎曲強度(1048.7±51.0 Kg/ cm��)最強,聚酯樹脂的諾氏硬度(20.0±1.2Kg/mm��)最大,環氧樹脂則撞擊強度最高 (1.47±0.20 KJ/m��)(2)壓克力樹脂與環氧樹脂之混合物除以2:1重量比混合之一組 外,其他各組之機械性質均明顯下降,與聚酯樹脂之混合物則撞擊強度及諾氏硬度不 變,彎曲強度減小。(3)壓克力樹脂添加纖維後依所添加纖維之量不同可使撞擊強度呈 近倍數增加(1.46±0.19,2.36±0.40,3.92±0.94 KJ/m��),彎曲強度及諾氏硬度則 無明顯變化。壓克力樹脂與環氧樹脂或聚酯樹脂混合之試樣於添加纖維後任何混合組之 撞擊強度均增加,但不如單獨壓克力樹脂添加等量纖維之效果,而彎曲強度減小,諾氏 硬度除了壓克力樹脂與聚酯樹脂混合之一組增大以外,其他均變小。由本實驗之結果可 獲得以下結論:(1)玻璃纖維之添加可提高壓克力樹脂之撞擊強度而不影響彎曲強度及 諾氏硬度。(2)添加環氧樹脂或聚酯樹脂則未見任何加強效果。 |
英文摘要 | This study was designed to evaluate the effects of using epoxy resin, polyester resin, and glass fiber as reinforcing materials to improve the mechanical properties of acrylic denture base resin. Three sets of experiments were perfomed. In the first set, resin blocks were prepared with three different resins acrylic, epoxy, and polyester, according to the manufacturers' instructions. In the second set, various concentrations of epoxy resin or polyester resin were mixed into acrylic resin. In the third set, 6-mm- long glass fibers were incoporated into all test resins at a concentration of 5 wt%. Samples were then cut to the correct size (70 × 25 × 15mm)from resin blocks, according to ASTM No.256 and ISO No.1567 specifications, to test impact strength and bending strength. Samples used for impact strength test were then retested with the Knoop hardness number test. Results were analyzed with one-way analysis of variance and Scheffe's post-hoc comparison. The results showed that, in the first set of experiments, acrylic resin had the best bending strength and Knoop hardness, and epoxy resin had the highest impact strength. The second set of experiments showed that the addition of epoxy resin decreased the bending and impact strengths as well as the Knoop hardness of epoxy resin. Decreased bending strength, but no change in impact strength or Knoop hardness was found when polyester resin was mixed with acrylic resin. In the third set of experiments, the impact strength increased several fold when glass fibers were incoporated into the acrylic resin, but there was no effect on bending strength or Knoop hardness. Incoporation of glass fibers into the various resin mixtures also increased the impact strength, but decreased the bending strength and Knoop hardness signifciantly. We thus conclude that by incorporating an appropriate amount of 6-mm-long glass fibers, the impact strength of acrylic resin can be increased remarkably without changes in bending strength or Knoop hardness. No improvement in the mechanical properties is produced by mixing epoxy or polyester resins with acrylic resin. |
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