共查询到18条相似文献,搜索用时 140 毫秒
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聚马来酸酐是聚烯烃、氯化聚烯烃用马来酸酐接枝改性的副产物。研究其基础物性对接枝反应产物的使用和分离具有一定的价值。本文测定了聚马来酸酐在 2 8种溶剂中的溶解性能 ,表明该物质能完全溶解在酮类、醇类、醚类、酯类等极性溶剂中 ,而在非极性的脂肪烃、芳烃类溶剂中不溶。用特性黏度法测定了该聚合物的溶解度参数为 2 2 .10 (J·cm-3 ) 1/2 。用共溶剂法研究了聚马来酸酐与其他树脂的相容性 ,发现该聚合物可以和氨基树脂 ,醇酸树脂 ,聚氨酯 ,丙烯酸树脂等完全相容。 相似文献
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氯化改性等规聚丙烯树脂合成的研究 总被引:4,自引:0,他引:4
采用溶液氯化方法,对固相接枝制得的等规聚丙烯接枝马来酸酐共聚物(IPP-g-MA)进行氯化反应,制得氯含量为30%-55%的氯化改性等规聚丙烯(MCPP)。用FT-IR、X光衍射、DSC和^13C NMR表征了产物的结构。MCPP树脂配制的聚丙烯塑料涂料和金属防腐蚀涂料均有很好的性能。 相似文献
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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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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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氯化等规聚丙烯的合成与表征 总被引:3,自引:0,他引:3
采用溶液氯化方法,对用固相接枝得到的等规聚丙烯接枝马来酸酐共聚物进行氯化反应,制得氯含量为30% ̄50%(质量分数)的氯化等规聚丙烯(MCPP),用FT-IR,X-衍射,DSC和^13C NMR表征了产物的结构,MCPP树脂可广泛用于印刷油墨和涂料等。 相似文献
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研究了玻璃纤维(GF)和马来酸酐接枝聚丙烯(PP-g-MAH)对聚丙烯力学性能的影响。结果表明:随着GF与PP的质量比增加,玻璃纤维增强聚丙烯的拉伸强度增加,冲击强度总体呈下降趋势。当PP与GF的质量比为55∶45时,拉伸强度最高,达到45MPa。当PP与GF的质量比一定时,在玻璃纤维增强聚丙烯复合材料中添加增容剂马来酸酐接枝聚丙烯(PP-g-MAH),可使其拉伸强度得到很大的提高,但是冲击性能却下降。当PP与GF的质量比为75∶25时,随PP-g-MAH与PP/GF复合材料的质量比增加,其拉伸强度先增大后减小,其冲击性能总体呈下降趋势。当PP-g-MAH,PP和GF的质量比为15∶75∶25时,其综合性能最优,拉伸强度为50.5MPa,冲击强度为4.3kJ/m2。 相似文献
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Guofeng Cai Jikui Wang Yanan Nie Xiaocai Tian Xudong Zhu Xiaping Zhou 《Polymer Composites》2011,32(12):1945-1952
Three kinds of reactive toughening agents of bamboo plastic composites are studied in this article. The bio‐fiber keeps high polarity for the hydroxyl groups of the surface, while polypropylene (PP) matrix resin phase is nonpolar. So, the interfacial compatibility between matrix and enhanced phase is poor. The anhydride in maleic anhydride grafted polypropylene can react with the hydroxyls. A large number of hydroxyl groups on the fiber surface are reduced, and the interfacial bond strength is improved. Three reactive toughening agents: glycidyl methacrylate grafted poly(ethylene‐1‐octene), maleic anhydride grafted poly(ethylene‐octene), and poly(ethylene‐butylacrylate‐glycidyl methacrylate) are chosen to improve the impact toughness. The mechanical properties, compatibility, phase structure, water absorption, and thermal properties of PP blends are all investigated. When the content of toughening agents are controlled between 6% and 8%, not only the impact strength is greatly improved but also the other properties of PP are less affected, which makes the composites with comprehensive and practical applications. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers 相似文献
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将马来酸酐接枝改性的氯化聚丙烯树脂(CPP-g-MAH)溶于乙酸丁酯中,再加入由Tween-20和Span-80组成的复合乳化剂进行乳化,获得了稳定的CPP-g-MAH乳液。研究了CPP-g-MAH乳液、丙烯酸复配树脂RX、乙二醇以及表面活性剂Surfynol465的用量对喷码油墨体系稳定性和墨层在聚乙烯(PE)表面附着力的影响,确定了较佳的乳化条件为:Tween-20与Span-80质量比3:2,Tween-20与Span-80的总质量为CPP-g-MAH质量的12%。较佳的水基喷码油墨配方(以质量分数表示)为:CPP-g-MAH乳液30%,水溶性丙烯酸树脂RX2%,乙二醇15%,Surfynol4651.5%。在此条件下制取的水基喷码油墨在PE表面的附着力达1.04N/mm2,非常适合于PE制品表面的喷码打印。 相似文献
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In this work, a modified alkyd resin (basic alkyd resin) was synthesized using maleic anhydride (MAH) to replace part of phthalic anhydride (PA) to achieve the target product acrylate-grafted-alkyd hybrid resin. The resin was then dispersed in water to form water-reducible emulsion. The properties were examined, including the extent of neutralization of final emulsion, ratio of MAH/PA in basic alkyd resin, mole ratio of basic alkyd resin to modified vinyl monomers, mole ratio of vinyl monomers (MMA/St/AA) on water dispersion stability of emulsion, particle size, drying time and mechanical properties. The optimal synthesis conditions produced a final emulsion particle size of 81.1 nm with good storage stability, hydrolytic stability and shorter drying time. The optimized synthesis conditions were identified as 80% neutralization, 1:0.8 mole ratio of basic alkyd resin to modified monomers, 4:3:2 modified monomers MMA/St/AA and 0.18 mole ratio of MAH/PA. 相似文献
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Preparation of Chlorinated maleic anhydride grafted polypropylene (Cl‐PP‐g‐MAH) by free radical process was carried out using carbon tetrachloride (CCl4) as the solvent and benzoperoxide (BPO) as the initiator. Effects of reaction temperature, concentrations of PP‐g‐MAH and BPO on the rate of chlorination were studied. The experimental results showed the actual rate constant for chlorination of maleic anhydride grafted polypropylene followed the Arrhenius law and the total apparent activation energy was 19.7 kJ mol?1. The kinetic model for chlorination of maleic anhydride grafted polypropylene was found to be R = K[BPO]0.53[C]0.93. The properties of chlorination of maleic anhydride grafted polypropylene were better than those of maleic anhydride grafted polypropylene. The products were characterized by Fourier transform infrared spectroscopy. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007 相似文献