第 40 卷第 5 期 |  | Vol. 40 No. 5 | 2010 年 10 月 | Oct 2010 |
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所屬欄目:功能材料
磷酸三苯酯對丙烯酸熔融接枝等規聚丙烯的影響 |
莫笑君,熊 晨,彭軍勇,蘇勝培*
(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:利用磷酸三苯酯(TPP)預溶脹等規聚丙烯(i-PP),而后將單體丙烯酸(AA)及引發(fā)劑過(guò)氧化異丙苯(DCP)分散于聚丙烯(PP)樹(shù)脂中,在190℃條件下熔融反應得到接枝產(chǎn)物。利用傅立葉紅外光譜分析儀(FT-IR)、熔融流動(dòng)速率測定儀、差示掃描量熱儀(DSC)、熱重分析儀(TGA)等對接枝產(chǎn)物的接枝率、熔融流動(dòng)速率(MFR)、結晶度及熱穩定性進(jìn)行了分析和表征。實(shí)驗結果表明,當w(TPP)=1%時(shí),較未添加TPP的AA接枝PP,AA接枝率增幅高達130%;TPP的加入可以有效降低副反應的發(fā)生;隨著(zhù)接枝率的提高,接枝產(chǎn)物的熔點(diǎn)(Tm)及結晶度(Xc)下降,接枝物的熱穩定性有顯著(zhù)提高。 |
關(guān)鍵詞:磷酸三苯酯;等規聚丙烯;丙烯酸;接枝率 |
中圖分類(lèi)號:TQ314.248 文獻標識碼:A 文章編號:1009-9212(2010)05-0061-05 |
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The Effect of Triphenyl Phosphate on the Melt Grafting of Isotactic Polypropylene with Acrylic Acid |
MO Xiao-jun,XIONG Chen,PENG Jun-yong,SU Sheng-pei*
(The Key Lab for Fine Processing of Resources and Advanced Materials of Hunan College,Changsha 410081,China) |
Abstract:The isotactic polypropylene (i-PP) was pre-swelled by TPP,and then mixed with the monomer AA and initiator DCP. Melt grafting of AA onto i-PP was carried out at 190℃. The melting flow ratio(MFR),crystallization,and thermal behavior of grafted polymers were characterized by means of melting flow ratio measurement,DSC and TGA. It was proved by FTIR that AA was grafted onto the PP backbone. The grafting degree reached a peak value when the content of TPP was 1%(m/m). The MFR results showed that the TPP can effectively reduce the side reactions. The results of DSC and TGA indicated that the melting temperature and crystallization degree were declined with the increase of grafting degree,whereas the thermal stability was improved. |
Key words:TPP;PP;acrylic acid;grafting yield |
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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-mailsushengpei@gmail.com)
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收稿日期:2010-11-03
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