臺灣博碩士論文加值系統

本研究旨在探討發泡劑不同、VA%高低、TPE之混摻以及不同加工工藝對EVA發泡之物性影響。發泡劑選用無機發泡母粒EE405F、有機發泡母粒7300以及有機發泡劑AC3000F；EVA選了VA26%與18%；TPE選用直鏈段的POE與本身即有部分物理交聯的SEBS進行物性之改良。使用微型混鍊機進行配方之混練，然後分別進行一次發泡、二段發泡和將配方投入押出機進行複合膜發泡。研究中採用TGA、DSC進行基材之熱性質分析，決定加工之溫度；利用微型混練機紀錄不同溫度膠料之黏度；使用SEM觀測發泡之孔洞型態；使用無轉子發泡流變儀分析發泡氣體壓力以及膠料交聯程度；對發泡後之樣品測試排水密度、抗拉強度、撕裂強度、壓縮永久變形、DMA等性質。
結果發現發泡劑對於EVA發泡物性的影響，使用無機發泡劑可以有較優良之物性；VA%對物性之影響不明顯；TPE混入EVA發泡可提升整體物性，尤以SEBS添加效果更佳；不同的發泡工藝對於發泡材之物性影響不大，但可以用來調控發泡材之物性。

The purpose of this study was to investigate the effects of different foaming agents, VA contents, TPE blending, and different processing methods on the physical properties of EVA foaming. We use foaming agent as follow: inorganic foam masterbatch-EE405F, organic foam masterbatch-7300, and organic foaming agent-AC3000F. We choose VA contents 18% and 26% of EVA. To Improve physical properties, we use two kinds of TPE. One is POE, which has straight chemical chain. And the other is SEBS, which has partially physically cross-linked. We use micro compounder to blend the sample, then put into molded foaming, two-stage foaming, or the extruder for foaming of three-layer film.
To determine the temperature of processing and thermal properties analysis of substrates, we use TGA and DSC in the study. Record the viscosity at different temperatures when using the micro compounder. Use SEM to observe the shape of the cell. Use moving die (foam pressure) rheometer to analyze the pressure of foaming and the degree of crosslinking. Test the characteristics of density, tensile strength, tear strength, compression set, DMA, etc. after foaming.
As a result, it was found that the effect of the foaming agent on the foaming properties of EVA can be improved by using an inorganic foaming agent. VA% doesn’t have obvious effect on physical properties. TPE blended with EVA foam can improve physical properties, especially with SEBS. Different foaming processes have little effect on the physical properties of EVA foam, but it can be used to control the physical properties of foamed materials.

摘要 I
Abstract II
致謝 IV
目錄 V
圖表索引 IX
第一章 緒論 1
1.1研究背景 1
1.2研究動機 3
1.3目標 4
第二章 文獻回顧 5
2.1塑膠發泡、發泡劑及EVA 5
2.1.1發泡種類 5
2.1.2發泡劑 6
2.1.2.1物理發泡劑 7
2.1.2.2化學發泡劑 8
2.1.3EVA 9
2.1.4SEBS 10
2.1.5POE 11
2.2塑料發泡 11
2.2.1流變學 12
2.2.2均質成核與異質成核 14
2.2.3發泡時氣泡的生長 16
2.3聚烯烴高分子發泡的交聯 17
2.3.1交聯 17
2.3.2交聯的特性 18
2.3.3聚烯烴發泡加工中的交聯 19
第三章 實驗 29
3.1 實驗架構 29
3.2 實驗材料與配方 30
3.2.1實驗材料 30
3.2.2實驗配方 31
3.3測試與分析 32
3.3.1樣品準備 32
3.3.1.1一次發泡與二段發泡 32
3.3.1.2三軸共押複合膜發泡 33
3.3.2熱重損失分析 Thermogravimetry Analysis(TGA) 33
3.3.3熱示差分析Differential Scanning Calorimetry(DSC) 34
3.3.4流變行為(Melting Viscosity) 34
3.3.5形態觀察 34
3.3.6發泡流變 35
3.3.7發泡後試片物性分析 35
3.3.7.1密度 35
3.3.6.2抗拉強度(Tensile Test) 35
3.3.6.3撕裂強度(Tearing Strength) 36
3.3.6.4壓縮永久變形率(Compression Set) 36
3.3.6.5黏彈性分析Viscoelastic analysis(DMA) 37
第四章 結果與討論 48
4.1熱性質分析 48
4.1.1熱裂解分析 48
4.1.2熱焓反應分析 49
4.2流變行為分析 50
4.3形態分析 50
4.4發泡流變分析 51
4.5發泡後物理性質分析 52
4.5.1發泡後試片密度 52
4.5.2抗拉強度測試 53
4.5.3撕裂強度測試 53
4.5.4壓縮永久變形率測試 54
4.5.5黏彈性分析 54
4.6二段發泡物性分析 55
4.7複合膜發泡物性分析 56
第五章 結論 91
參考文獻 92

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