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研究生： 林育晟
YU-CHEN LIN
論文名稱： 延伸及熱定型條件對EVOH/Nylon6/LDPE四層共押出膜聚集結構影響效應之研究
Effect of drawing and annealing process on aggregate structure and properties of EVOH、Nylon6、LDPE co-extrusion multilayer film
指導教授： 邱顯堂
Hsien-Tang Chiu
口試委員: 賴秋君
Qiu-Jun Lai
邱智瑋
Chih-Wei Chiu
學位類別： 碩士
Master
系所名稱： 工程學院 - 材料科學與工程系
Department of Materials Science and Engineering
論文出版年： 2015
畢業學年度： 103
語文別： 中文
論文頁數： 114
中文關鍵詞： 乙烯-乙烯醇共聚物 、尼龍6 、低密度聚乙烯 、共押出 、熱定型 、取向 、結晶 、阻隔性能
外文關鍵詞： EVOH, Nylon6, LDPE, co-extrusion, annealing, orientation, crystallization, barrier property
相關次數： 點閱：241  下載：0 
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    • 以EVOH、LDPE、Nylon6為原料，藉由熔融流動指數儀與動態旋轉式流變儀測量其流變性質，選擇適當之塑料型號再利用流延薄膜法透過小型三軸共押出機押出EVOH/ Nylon6/LDPE三層複合薄膜。採用熱差示掃描量熱儀、熱動態機械分析儀、廣角X射線衍射儀研究拉伸速率、倍率、溫度與熱定型溫度與時間處理對薄膜結晶和熱性能的影響；並以水氣透過率測定儀與氧氣透過率分析儀測量其延伸定型後薄膜之阻隔性能。結果表明：拉伸速率增加，應變下降而應力上升、結晶度也有降低之趨勢；熱延伸溫度增加，應變增加應力減少，結晶度也增加，而無論MD或TD方向，應選在55℃~75℃溫度區間拉伸；延伸倍率增加，結晶度增加；熱定型溫度與時間具等效性，熱定型溫度增加，薄膜之結晶度增加，由DSC與DMA可觀察到於100℃下60秒有最好之熱定型效果；拉伸強度MD大於TD，應變則相反，DSC也可觀察到MD之結晶度大於TD方向之結晶度；結晶度與阻隔性有一定之關係，當延伸倍率提高時阻隔性也隨之上升

    In this study, Ethylene vinyl alcohol、Low-density polyethylene and Polyamide6 is used as raw materials, using the Melt flow tester and the MCR rheometer to characterize the flow properties and rheological behavior and choose the proper materials to extrude EVOH/ Nylon6/LDPE multilayer film by three layer co-extruder .
    The effects of drawing speed 、draw ration、drawing temperature and annealing process on the crystallinity and thermal property of the film were studied with Differential scanning calorimeter 、Dynamic mechanical analysis and Wide angle x-ray diffraction；and the barrier properties were measured by Water Vapor Transmission Tester and Oxygen permeation analyzer. The results showed that the tensile strength rised but the elongation droped with the increasing of drawing rate, and the crystallinity droped,too. The tensile test of heat drawing temperature shows the reverse trend with drawing rate and heat setting temperature should be controlled in the range of 55℃~75℃.The crystallinity increased with the drawing ratio .From the result of DSC and DMA ,the annealing temperature increased ,the crystallinity also ascending. The crystallization process nearly accomplished with the condition of 100℃ for 60 seconds. The tensile strength of  machine direction is higher than transverse direction，and lower for elongation, and from the evidence of DSC the crystallinity of machine direction is larger than transverse direction. There is a positive relation between crystallinity and barrier property ,the barrier ability increased with the crystallinity.

    摘要 I Abstract II 誌謝 III 目錄 IV 圖索引 VII 表索引 IX 第一章 緒論 1 1.1研究動機與目的 1 1.2.軟包裝材料阻隔性分類[14] 2 1.3阻隔性薄膜的應用 3 1.3.1食品包裝方面之應用 3 1.4高分子薄膜成型之方法 4 1.4.1流延薄膜法 4 1.4.2吹塑薄膜法 5 1.5改進材料阻隔性能方法的研究進展[15] 6 參考文獻 8 第二章 文獻回顧 10 2.1阻隔性包裝膜的加工方法[34] 11 2.1.1乾式複合法 11 2.1.2塗布複合法 11 2.1.3共押出複合法 12 2.1.4蒸鍍複合法 14 2.2阻氣阻水[1-3] 15 2.2.1表面處理法 15 2.2.1.1表面化學處理法 15 2.2.1.2真空蒸鍍 16 2.2.2多層複合法[1-3] 17 2.2.2.1多層乾式複合法 17 2.2.2.2多層共押複合法 17 2.2.2.3多層共擠流延法 18 2.2.3層狀共混法 18 2.2.3.1納米材料共混法 19 2.2.4阻隔機理[34] 20 2.2.4.1材料阻隔性能的影響因素 20 2.2.4.2聚合物材料滲透性的表徵方法 22 2.3高分子的延伸 23 2.3.1延伸機的構造[36] 23 2.3.2 MDOPF縱向延伸膜[36] 24 2.3.3 TDOPF橫向延伸膜[36] 25 2.3.4 BOF雙軸延伸膜 26 2.3.5 MMF微米多層膜 28 2.4薄膜樣品之熱定型 30 第三章 實驗材料、儀器與方法 31 3.1實驗材料 31 3.2實驗架構 33 3.3實驗儀器 34 3.4實驗方法 35 3.4.1三軸共押 35 3.4.1.1雙軸延伸 37 3.4.2 物理性能 37 3.4.2.1強伸度試驗 37 3.4.2.2剝離試驗 38 3.4.2.3回縮率測定 39 3.4.2.4熔融流動指數 39 3.4.2.5動態流變性能測試 40 3.4.3熱性質分析 41 3.4.3.1熱示差掃描分析(DSC) 41 3.4.3.2熱重量損失分析(TGA) 41 3.4.3.3熱動態機械分析(DMA) 42 3.4.4形態學分析 43 3.4.4.1掃描式電子顯微鏡(SEM) 43 3.4.4.2廣角X射線衍射WAXD 44 3.4.5透過率性質 45 3.4.5.1水氣透過率測定(WVTR) 45 3.4.5.2氧氣透過率(O2TR) 45 第四章 結果與討論 46 4.1原物料之分析鑑定及加工參數 46 4.1.1、塑料原物料之熱性質分析 46 4.1.1.1熱示差分析掃描 46 4.1.1.2熱重損失分析 48 4.1.2、塑料原物料之流變行為 49 4.1.2.1熔融流動指數 49 4.1.2.2動態流變性能測試 49 4.1.3三軸共押出 52 4.1.3.1 compatibilizer劑量的影響 58 4.1.3.2雙軸延伸 59 4.2 MD方向延伸薄膜之加工參數及分析 60 4.2.1延伸倍率、延伸溫度對MD薄膜之影響 60 4.2.1.1強伸度試驗 60 4.2.2.2熱示差掃描分析 62 4.2.2.3回縮率測定 66 4.2.2 延伸速度對MD薄膜之影響 67 4.2.2.1強伸度試驗 68 4.2.2.2熱示差掃描分析 71 4.2.3、定型溫度、時間對MD薄膜之影響 73 4.2.3.1熱示差掃描分析 74 4.2.3.2回縮率測定 77 4.2.3.3 X光繞射 78 4.2.3.4動態熱機械分析 79 4.3 TD方向延伸薄膜之加工參數及分析 81 4.3.1延伸溫度、延伸倍率對TD薄膜之影響 81 4.3.1.1 強伸度試驗 81 4.3.1.2熱示差掃描分析 84 4.3.1.3回縮率測定 87 4.3.2 延伸速度對TD薄膜之影響 88 4.3.2.1強伸度試驗 88 4.3.2.2熱示差掃描分析 91 4.3.3、定型溫度、時間對TD薄膜之影響 93 4.3.3.1熱示差掃描分析 93 4.3.3.2回縮率測定 96 4.3.3.3 X光繞射 98 4.3.3.4動態熱機械分析 99 4.4 MDF、TDF、BOF 100 4.4.1 物理性質 100 4.4.2熱性質分析 103 4.4.2.1熱示重分析 103 4.4.3透過率性質 107 第五章 結論 109 參考文獻 110

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