需要金幣:![]() ![]() |
資料包括:完整論文 | ![]() |
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轉(zhuǎn)換比率:金額 X 10=金幣數(shù)量, 例100元=1000金幣 | 論文字?jǐn)?shù):13421 | ![]() | |
折扣與優(yōu)惠:團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式:Word格式(*.doc) | ![]() |
摘要:以工業(yè)聚四氟乙烯(PTFE)乳膠粒子為種子,進(jìn)行苯乙烯/丙烯腈(St/AN)種子乳液聚合來制備PTFE-SAN核殼粒子。研究復(fù)合乳化劑十二烷基硫酸鈉(SDS)/OP-10用量和組成以及攪拌槳的轉(zhuǎn)速對聚合穩(wěn)定性、復(fù)合粒子的粒徑大小和分布的影響。研究以所得到的PTFE-SAN核殼粒子改性的阻燃PC/ABS合金的氧指數(shù)(LOI)、垂直燃燒測試(UL94)、力學(xué)性能、熱失重行為的影響。結(jié)果表明,通過改變SDS和OP-10的比例可以改變包覆效果,而且轉(zhuǎn)速在120r/min的條件下包覆效果最佳,粒徑大小和粒徑分布以及紅外表征都比較理想。在BDP阻燃PC/ABS合金混入適量改性的抗滴落劑以后,氧指數(shù)上升,但是力學(xué)性能(拉伸強(qiáng)度和沖擊強(qiáng)度)稍有下降。 關(guān)鍵詞:聚四氟乙烯;乳液聚合;核殼結(jié)構(gòu);表面包覆;抗滴落劑
Abstract:Industrial polytetrafluoroethylene (PTFE) latex particles as seeds, for styrene/ acrylonitrile (St/AN) seed emulsion polymerization to prepare PTFE-SAN core-shell nanospheres, that to improving the compatibility of PTFE with the substrate sex.Research the effects on the stability of polymerization as well as particle size and distribution of composite particles when change the compound emulsifier sodium dodecyl sulfate (SDS) / OP-10 dosage and composition and the stirrer speed. Study the oxygen index (LOI) of PC/ABS alloy modified by the PTFE-SAN core-shell nanospheres we prepared , vertical burning test (the UL94), mechanical tests and the TGA test.The results showed that the modified conditions of the PTFE is manageable, the coating effect can be changed by changing the ratio of SDS and OP-10, and speed in the conditions of 120r/min coated the best results , particle size and particle size distribution and infrared characterization are all appropriate .When BDP flame retardant PC/ABS alloy mixed with appropriate amount of modified anti-dripping agent, oxygen index rose, but the mechanical properties(tensile strength and impact strength)of a slight decline. Key words:PTFE;emulsion polymerization;core-shellstructure;surface coating;anti-dripping agent
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