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聚丙烯纤维化学接枝改性增强水泥基复合材料的界面结合

, PP. 238-244

Keywords: 聚丙烯纤维,化学接枝改性,水泥基复合材料,界面结合,抗塑性收缩开裂

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Abstract:

以过氧化苯甲酰(BPO)为引发剂,采用二步化学接枝法对聚丙烯纤维进行接枝丙烯酸改性,利用正交分析法研究了引发温度、BPO浓度、接枝温度、接枝时间及丙烯酸(AA)浓度对纤维接枝率的影响,并评价了改性前后纤维与水泥基体的界面结合性能。结果表明:上述因素对纤维接枝率的影响大小为引发温度>BPO浓度>接枝时间>接枝温度>AA浓度,最佳反应条件为引发温度90℃,BPO4.50×10-2mol/L,接枝时间60min,接枝温度75℃,AA1.4mol/L,此时纤维接枝率达13.12%;经化学接枝改性后,聚丙烯纤维表面亲水性和粗糙度增大,与水泥基体的界面结合得到增强,纤维掺量为0.05%(体积分数)时,聚丙烯纤维增强水泥砂浆的抗开裂性能比增大了26.6%,抗塑性收缩开裂性能显著增强。

References

[1]  邢 锋, 冷发光, 冯乃谦, 等. 克裂速纤维增强混凝土抗裂性能[J]. 复合材料学报, 2002, 19(6): 120-124. Xing Feng, Leng Faguang, Feng Naiqian, et al. Properties of cracking resistance of cemfiber reinforced concrete[J]. Acta Materiae Compositae Sinica, 2002, 19(6): 120-124.
[2]  冯长根, 胡秀峰, 曾庆轩, 等. 聚丙烯纤维接枝丙烯酸反应条件优化[J]. 化工学报, 2005, 56(3): 555-559. Feng Changgen, Hu Xiufeng, Zeng Qingxuan, et al. Optimum conditions of grafting copolymerization of polypropylene fiber with acrylic acid[J]. Journal of Chemical Industry and Engineering, 2005, 56(3): 555-559.
[3]  Uyama Y, Kato K, Ikada Y. Surface modification of polymers by grafting[J]. Advances in Polymer Science, 1998, 137(1): 1-39.
[4]  马建标. 功能高分子材料[M]. 北京: 化学工业出版社, 2000: 54-60. Ma Jianbiao. Functional polymer materials[M]. Beijing: Chemical Industry Press, 2000: 54-60.
[5]  Buchenska J. Modification of polyester fibers by grafting with poly(acrylic acid)[J]. Journal of Applied Polymer Science, 1997, 65(5): 967-977.
[6]  Buchenska J. Polypropylene fibers grafted with poly(acrylic acid)[J]. Journal of Applied Polymer Science, 2002, 83(11): 2295-2299.
[7]  Wang Wei, Wang Li, Chen Xu, et al. Study on the graft reaction of poly(propylene) fiber with acrylic acid[J]. Macromolecular Materials and Engineering, 2006, 291(2): 173-180.
[8]  Tong Gangsheng, Liu Tao, Zhao Ling, et al. Supercritical carbon dioxide-assisted preparation of polypropylene grafted acrylic acid with high grafted content and small gel percent[J]. The Journal of Supercritical Fluids, 2009, 48(3): 261-268.
[9]  全国水泥制品标准化技术委员会. JC/T 951-2005 水泥砂浆抗裂性能试验方法[S]. 北京: 中国建材工业出版社, 2005. National Technical Committee on Cement Products of Standardization Administration of China. JC/T 951-2005 Test method for cracking-resistance of cement mortar[S]. Beijing: China Standards Building Materials Press, 2005.
[10]  潘祖仁. 高分子化学[M]. 北京: 化学工业出版社, 2009: 60-94. Pan Zuren. Polymer chemistry[M]. Beijing: Chemical Industry Press, 2009: 60-94.
[11]  Soroushian P, Ravanbakhsh S. Control of plastic shrinkage cracking with specialty cellulose fibers[J]. ACI Materials Journal, 1998, 95(4): 429-435.
[12]  Shah S P, Quyang C. Mechanical behavior of fiber-reinforced cement-based composites[J]. Journal of the American Ceramic Society, 1991, 74(11): 2727-2953.

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