共查询到18条相似文献,搜索用时 62 毫秒
1.
2.
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
3.
4.
5.
6.
7.
酸碱滴定法测定马来酸酐接枝氯化聚丙烯的接枝率 总被引:3,自引:0,他引:3
讨论了测定马来酸酐接枝氯化聚丙烯[(PP-C)-g-MAH]接枝率的重要意义,分析了几种接枝率测定方法的优缺点.针对(PP-C)-g-MAH的特殊结构,研究了一种利用酸碱滴定法准确测定接枝物酸值的测定方法.通过考察(PP-C)-g-MAH主链上叔碳氯脱除量的影响因素,确定了接枝率测定方法的工艺参数,并对误差情况进行分析. 相似文献
8.
马来酸酐接枝聚丙烯的进展 总被引:14,自引:0,他引:14
马来酸酐接枝聚丙烯是拓宽聚丙烯应用领域的重要手段之一,本文综述了马来酸酐接枝聚丙烯的接枝方法和原理,接枝物的性能以及接枝物在聚丙烯合金和共混物、复合材料、粘合剂和涂料领域的广泛应用。 相似文献
9.
10.
11.
12.
13.
The properties of poly(ethylene terephthalate) (PET) and polypropylene (PP) blends and PET/maleic anhydride-grafted PP (MAgPP) reactive blends were investigated. Two blend systems were immiscible based on tan δ measured by dynamic mechanical analyzer (DMA). In case of PET/MAgPP blends, the reaction of ester groups of PET and MA sites on MAgPP occurred during melt mixing at 280°C for 30 min. The reaction was confirmed by a new peak between the glass transition temperatures of PET-rich and MAgPP-rich phase on tan δ curves, as well as from the rheological properties. From the morphology, the improvement of the dispersibility in PET/MAgPP reactive blends was observed. The modulus of PET/MAgPP blends was higher than that of PET/PP blends, and the strength of PET/MAgPP blends showed the good adhesion compared with the PET/PP blends. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 70: 389–395, 1998 相似文献
14.
15.
16.
了提高非极性聚丙烯纤维(PP)的相容性,采用固相法以马来酸酐(MAH)对聚丙烯纤维进行接枝改性,研究了反应条件对接枝率的影响。结果表明,马来酸酐成功接枝到聚丙烯上,当反应温度为80℃,PP用量为0.5 g,MAH用量为0.2 g,BPO用量为0.05 g,回流时间为2.5 h时,最大接枝率可达到7.51%;BPO的用量、MAH单体的用量以及反应温度对PP纤维的接枝率影响较大。而测定PP纤维接枝率时回流时间对其接枝率的影响不大;接枝聚丙烯纤维的分解温度明显高于纯聚丙烯纤维。 相似文献
17.
18.
Polypropylene (PP) was modified by solid‐phase graft copolymerization with maleic anhydride (MAH) and styrene (St), using benzoyl peroxide as the initiator and xylene as the interfacial agent. Effects of various factors such as monomer concentration, monomer ratio, initiator concentration on grafting percentage, and acid value were investigated. The graft copolymer was characterized by Fourier transform infrared, pyrolysis gas chromatography—mass spectroscopy, and dynamic mechanical analysis, and the intrinsic viscosity of the extractive from the reaction product was investigated. The results showed that the grafting percentage and acid value of the graft copolymer of PP with two monomers (MAH and St) were considerably higher than those of the graft copolymer of PP with MAH alone. The graft segments were shown to be the copolymer of St and MAH with a substantial molecular weight. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 2482–2487, 2000 相似文献