第 41 卷第 2 期 |  | Vol. 41 No. 2 | 2011 年 4 月 | Apr 2011 |
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所屬欄目:染料、顏料及涂料
長(cháng)鏈烷基咪唑類(lèi)離子液體對等規聚丙烯熔融接枝丙烯酸的影響 |
莫笑君,熊 晨,彭軍勇,王 曦,蘇勝培*
(湖南師范大學(xué) 化學(xué)化工學(xué)院,資源精細化與先進(jìn)材料湖南省高校重點(diǎn)實(shí)驗室,湖南 長(cháng)沙 410081) |
摘 要:制備了一系列含不同碳原子數的強極性咪唑類(lèi)離子液體([Cnmim]Cl)和弱極性的([Cnmim]PF6),并將其應用于等規聚丙烯(i-PP)熔融接枝丙烯酸(AA),考察了離子液體極性強弱和烷基鏈碳數對接枝率和副反應的影響。結果表明:強極性的[Cnmim]Cl對接枝率沒(méi)有明顯提高的作用,而弱極性的[Cnmim]PF6可顯著(zhù)提高接枝率,且烷基鏈越長(cháng),AA的接枝率越高;長(cháng)鏈烷基咪唑類(lèi)離子液體可顯著(zhù)降低接枝過(guò)程中副反應的發(fā)生,[Cnmim]PF6在降低副反應方面的作用優(yōu)于[Cnmim]Cl。DSC結果表明弱極性的[Cnmim]PF6可以很好對等規PP進(jìn)行溶解,隨烷基碳數和用量的增多,溶解效果越好,強極性的[Cnmim]Cl溶解效果相對差些;相比未接枝PP,接枝物熔融溫度較接近,而結晶溫度和結晶度都降低。XRD分析結果表明在離子液體作用下所得到的接枝物中沒(méi)有β晶型的生成。 |
關(guān)鍵詞:等規聚丙烯;丙烯酸;咪唑類(lèi)離子液體;接枝率;副反應 |
中圖分類(lèi)號:TQ050.4+3 文獻標識碼:A 文章編號:1009-9212(2011)02-0056-07 |
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The Effects of Long-chain Imidazoliums on the Melt Grafting of i-PP with Acrylic Acid |
MO Xiao-jun,XIONG Chen,PENG Jun-yong,WANG Xi,SU Sheng-pei*
(The Key Lab for Fine Processing of Resources and Advanced Materials of Hunan College,College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China) |
Abstract:A series of imidazoliums([Cnmim]Cl and [Cnmim]PF6)were prepared and applied to the melt grafting of polypropylene with acrylic acid. The effects of the type of anion and the number of alkyl carbon on the grafting degree and side reaction were studied. The results indicated that the [Cnmim]PF6 could increase the grafting degree greatly and the longer the alkyl,the higher the grafting degree. The data of MFR and gel content showed that both [Cnmim]PF6 and [Cnmim]Cl can reduce the side reactions and [Cnmim]PF6 had a better effect. Based on the DSC analysis,[Cnmim]PF6 can swell PP well. A better swell effect can be obtained with a longer chain of alkyl. The melting and crystallization temperature was reduced as well as the crystallization degree. The β-form cannot be produced during the melt grafting. |
Key words:PP;acrylic acid;imidazolium;grafting rate |
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基金項目:湖南師范大學(xué)產(chǎn)學(xué)研課題(化090415)。
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作者簡(jiǎn)介:莫笑君(1985-),女,湖南邵陽(yáng)人,碩士研究生,研究方向:高分子復合材料。(E-mail:moxiaojun197@163.corn)
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聯(lián) 系 人: 蘇勝培,教授,瀟湘學(xué)者,研究方向:納米復合材料。(E-mail:sushengpei@gmail.com)
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收稿日期:2011-03-2
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