共查询到18条相似文献,搜索用时 125 毫秒
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以甲基环己烷为溶剂、过氧化二苯甲酰(BPO)为引发剂,加入马来酸酐(MAH)以及苯乙烯(St)对氯化聚丙烯(CPP)进行接枝改性。系统研究了单体MAH、St、过氧化二苯甲酰(BPO)对MAH接枝率的影响,并对其影响因素进行了分析。用红外光谱(FTIR)表征了产物结构,用滴定的方法测定了接枝率,实验结果表面:最佳反应条件为BPO/CPP投料比为10%,St/MAH投料比为1∶1,MAH/CPP投料比为20%,反应温度为100℃,反应时间为2 h。通过聚丙烯(PP)板涂装底漆附着力测试表明,当氯化聚丙烯接枝马来酸酐(CPP-g-MAH)接枝率达到3.14%时涂层附着力等级可达到0级。 相似文献
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LLDPE溶液接枝马来酸酐的研究 总被引:8,自引:1,他引:8
研究了在二甲苯溶剂中,以过氧化二苯甲酰(BPO)为引发剂,线性低密度聚乙烯(LLDPE)接酸酐的反应,采用正交实验方法考察了引发剂用量,单体及PE浓度。反应温度及时间、阻止交联剂的加入量等因素对接枝反应的影响。结果表明,各因素对PE接枝率影响的大小次序是MAH用量,反应温度、阻止交联剂用量、LLDPE浓度和BPO有用量,阻止交联剂的加入可以有铲地防止PE恶性循环 自由基的交联。 相似文献
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以过氧化物为引发剂、马来酸酐(MAH)为单体,采用溶液法对乙烯-丙烯酸丁酯共聚物(EBA)进行接枝改性,并用傅立叶红外光谱技术对接枝物(EBA—g—MAH)进行了表征。系统考察了引发剂种类及用量、反应温度、反应时间、单体用量等因素对接枝率及熔体流动速率的影响。实验结果显示,EBA接枝MAH的优化反应条件是:原料配比为m(EBA):m(MAH):m(BPO)=100:2:0.28,反应时间为4h,反应温度为90℃,接枝率可达0.78%。随着反应温度的升高,接枝物的熔体流动速率急剧下降。不同的过氧化物引发剂对接枝反应的影响明显不同,与过氧化二异丙苯(DCP)相比,选择过氧化二苯甲酰(BPO)为引发剂,接枝效果较好,同时所得接枝物的MFR值适中。 相似文献
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In general, it has been accepted that maleic anhydride (MAH) cannot be homopolymerized under normal conditions. However, MAH can be grafted onto substrates under UV irradiation rather easily. In this study, the photografting polymerization of MAH was examined with low‐density polyethylene (LDPE) film as a substrate. The initiating performances of different photoinitiators, including benzophenone (BP), Irgacure 651, and benzoyl peroxide (BPO), were examined. The effects of some principal factors, such as the temperature, solvent, and UV intensity, on the grafting polymerization of MAH were also investigated. The results show that MAH can be smoothly grafted onto LDPE film by UV radiation. Enhancing the intensity of UV radiation and elevating the irradiation temperature facilitate the grafting polymerization of MAH. Among BP, Irgacure 651, and BPO, Irgacure 651 can initiate the polymerization of more MAH, but BP is more effective for the initiation of surface grafting polymerization. Solvents of MAH also have a great influence on the grafting polymerization; some of them even seem to take part in the reaction. The occurrence of photografting polymerization was verified with Fourier transform infrared and electron spectroscopy for chemical analysis spectra. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 87: 2318–2325, 2003 相似文献
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以马来酸酐(MAH)等为单体接枝聚丙烯作为聚丙烯(PP)/黏土复合材料熔融剂,考察了马来酸酐用量、引发剂过氧化苯甲酰(BPO)用量、反应时间、温度等因素对产物接枝率的影响,并通过红外光谱图对PP-g-MAH进行表征。结果表明,当m(PP):m(复配单体):m(BPO)=10.0:2.0:0.6、反应温度控制在120℃左右、复配单体为马来酸酐/苯乙烯时,熔融剂PP-g-MAH的接枝率可获得较大值3.9%。实验同时表明,反应时间对接枝率的影响不大;苯乙烯的加入对接枝率有较大的影响,与普通单体单一马来酸酐相比,加入苯乙烯的接枝率明显提高。 相似文献
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The graft copolymerization of maleic anhydride (MAH) onto acrylonitrile–butadiene–styrene terpolymer (ABS) was carried out with dicumyl peroxide (DCP) and benzoyl peroxide (BPO) as the binary initiators and with styrene as the comonomer in the molten state. IR spectra confirmed that MAH was successfully grafted onto the ABS backbone. A reaction mechanism was proposed: the grafting most likely took place through the addition of MAH radicals to the double bond of the butadiene region of ABS. Influences such as the MAH concentration, the initiators and their concentrations, the reaction temperature, the rotating speed, and the comonomer concentration were studied. The results indicated that using styrene as a comonomer and DCP/BPO as binary initiators was beneficial for the graft copolymerization. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 1249–1254, 2003 相似文献