本研究利用polyoxypropylenediame (Jeffamine D400、D2000系列)與2-chloroethylamine (CEA)進行反應，以製備多層的ethylene imines (EI) 基團的擬樹枝狀高分子[D400(EI)x、D2000(EI)a]。接著，導入diethyl chlorothiophosphate於所合成之高分子系統中，使高分子含有thiophosphate基[D400(EI)xPy、D2000(EI)aPb]。在鑑定方面，以核磁共振光譜儀 (1H- 與13C-NMR) 與元素分析儀 (EA) 確認所合成之高分子。以電位滴定法(potentiometric titration) 測定胺含量 (amine values)，並以傅立葉遠紅外線光譜 (FT-IR) 測定N-P、P=S官能基的吸收。以所合成的高分子作為添加劑加入基礎油D400中，以抗磨耗測定儀量測上、下試件之間之摩擦係數、接觸電阻值以及油溫，評估添加劑在極壓下抗磨耗效果。實驗後之上試件以EDS以及SEM觀察表面構造以及元素組成，並記錄實驗前後之磨耗重量，來佐證實驗結果。

　　實驗結果顯示，含有最多thiophosphate基之高分子表現出最高的電阻值，而電阻值的大小與降低上、下試件之摩擦係數成正比，並影響油溫的高低。比較EI值、PPO鏈段長短、含磷硫多寡後發現：相同EI值高分子，thiophosphate基含量越高在極壓下抗磨耗效果越好；相同EI值、相同thiophosphate含量下，主鏈PPO的增長並不會增加極壓下的抗磨耗的效果；不同EI值、相同thiophosphate含量下，EI值的增加並不會增加極壓下的抗磨耗的效果。以SEM以及EDS觀察表面後發現，含thiophosphate基最多的高分子添加劑，其在磨耗後試片上觀察到的的P元素比例最高，磨耗量也最少；就添加劑而言，所合成的D400(EI)8P9所得到的接觸電阻為~200 ohm、摩擦係數為~0.02、油溫為~100 ℃，具有最佳的抗磨耗效果。

　　In this study, we plan to synthesize pseudo-dendritic polymer [D400(EI)x、D2000(EI)a]containing multi-layers of ethylene imines group with 2-chloroehtylamine onto polyoxypropylenediamine series : [D400 and D2000]。Next, to induct diethyl chlorothiophosphate into polymer, make polymer have thiophosphate groups [D400(EI)xPy、D2000(EI)aPb]at the end of it. According to the result of NMR(1-H and 13-C)、EA to character polymer structure ; using potentiometeric titration to calculate amine values ; FT-IR measuring the absorption of functional group : N-P、P=S. Polymer D400 as base stock and polymer synthesized as lubricatant additives, performance of additives depends on the result of contact resistance、frictional coefficient、oil temperature in the AW and EP tests. We use SEM and EDS to observe the consistence of chemistry element and morphology on the surface of upper specimens, so the wear amounts of upper specimens can also provide a proof of experiment result value of contact resistance

　　The test result of AW and EP shows that if additives contained the most thiophsophate groups could have the highest performance in contact resistance. Besides, the value of contact resistance in proportion to the decreasing value of the frictional coefficient and has influenced on the oil temperature. To compare with EI values、polymer chain and ratio of thiophosphate contained, we get the following result : in the same EI values, the more thiophosphate group that polymer contained, the better test performance of AW and EP ; the increasing polymer chain can not increase the test performance of AW and EP ; different EI values but the same thiophosphate group that polymer contained, the increasing values of EI can not increase the test performance of AW and EP. Observe result of SEM and EDS, the most thiophosphate group that polymer contained has the most ratio of phosphorous element on upper specimens after AW and WP tests and the amount of wear was least, too. In among of synthesized polymer additives, D400(EI)8P9 has the highest contact resistance ~200 ohm、the lowest frictional coefficient ~0.02 and the lowest oil temperature ~100 ºC, has the best test performance of AW and EP.

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