臺灣博碩士論文加值系統

本研究藉由數種聚合法製成微米粒徑級聚苯乙烯微球，經由粗化、敏化與活化等步驟，使聚苯乙烯微球表面具有觸媒活性，再進行無電鍍鎳。不同之單體濃度、界面活性劑用量、起始劑濃度及聚合反應溫度均影響最終微粒粒徑與分散度。聚苯乙烯微球之無電鍍鎳則受不同pH值鍍液及不同之鎳磷組成所影響，由結果顯示經在70℃、攪拌速率300~400 rpm、pH值為7之鍍液可得到具磁性鎳金屬層高分子微粒；希望藉由鎳鍍層當作微波吸收層，製成可吸收微波之高分子微粒。

The polystyrene micro-spheres in the micron diameter range were made by polymerizations. The magnetic fine particles were prepared by electroless nickel-plating after sensitization and activation. The concentration of monomer and initiator, the amount of surfactant used, and polymerization temperature will affect the particle size and disparity of microspheres. The amount of nickel deposited on microspheres is strongly dependent on the pH value of plating bath and bath composition. The experimental results have shown that the magnetic fine particles can be made under the suitable temperature of 70℃, stirring rate in 300~400rpm and the pH value is 7 of plating bath. The nickel-plating thin layer on the spherical particles might have the ability of electromagnetic absorbent. We hope that the electromagnetic absorbent polymeric powders can be made through an appropriate processing.

1.前 言 1
2.文獻回顧 4
3.理論背景 7
3.1.高分子微粒之製備 7
3.1.1.液滴聚合法 7
3.1.2.粒子成長法 9
(一)乳化聚合法 9
(二)無乳化劑聚合法 12
(三)分散聚合法 14
3.2.無電電鍍鎳 16
3.2.1.粗化 19
3.2.2.敏化 19
3.2.2.活化 20
3.3.介電性質量測 21
4.實驗部份 22
4.1.實驗藥品 22
4.2.實驗儀器設備 23
4.3.高分子微粒之合成 25
4.3.1.乳化聚合 25
4.3.2.無乳化劑乳化聚合 25
4.3.3.分散聚合 25
4.4.無電電鍍鎳 25
4.5.鍍液組成 26
4.6.介電性質量測 27
5.結果與討論 28
5.1.不同聚合法製備高分子微粒 28
5.1.1.乳化聚合法 29
(一)界面張力的量測 29
(二)高分子微粒粒徑量測 32
5.1.2.無乳化劑聚合法 32
5.1.3.分散聚合法 33
5.2.高分子微粒孔隙表面積量測 35
5.3.微粒分子量量測 35
5.4.無電鍍鎳中施鍍條件之控制 36
5.4.1.鍍液pH值對鎳析鍍速率之影響 36
5.4.2.不同pH值鎳磷含量比較 37
5.4.3.不同pH值施鍍後熱分析比較 41
5.4.4.不同pH值鍍層表面型態結構 43
5.5.不同條件表面改質高分子微粒 47
5.6.高分子微粒表面鎳金屬析鍍分佈 47
5.7.聚合微粒施鍍前後之熱分析 53
5.8.介電常數的量測 55
6.結 論 58
參考文獻 59
自 傳 65

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