P(VAc-DBM-AA-AMPS)共聚乳液的结构特点对水泥砂浆力学性能的影响

doi:10.19491/j.issn.1001-9278.2019.01.008

中国塑料 ›› 2019, Vol. 33 ›› Issue (1): 40-47.DOI: 10.19491/j.issn.1001-9278.2019.01.008

P(VAc-DBM-AA-AMPS)共聚乳液的结构特点对水泥砂浆力学性能的影响

李美兰^1,2,龚伟^1,2,师静¹,姚丹¹,吕盼盼¹,刘白玲²

1.商洛学院 2.中国科学院成都有机化学研究所

收稿日期:2018-08-18 修回日期:2018-09-21 出版日期:2019-01-26 发布日期:2019-02-25
基金资助:
商洛市科技项目（SK2016-47）

Effect of Structure Feature of Poly(VAc-DBM-AA-AMPS) Emulsion on Mechanical Properties of Cement Mortars

Received:2018-08-18 Revised:2018-09-21 Online:2019-01-26 Published:2019-02-25

摘要/Abstract

摘要： 通过抗压和抗折试验研究了醋酸乙烯酯马亚酸二丁酯丙烯酸2丙烯酰胺基2甲基丙磺酸共聚乳液［P(VAc-DBM-AA-AMPS)］对水泥砂浆力学性能和耐久性的影响。结果表明，AMPS的引入，能显著地提高了共聚乳液胶膜的耐盐性；同时，随着AMPS的用量的增加，共聚乳液改性水泥砂浆的力学强度呈现出先增大后减小的趋势，且在AMPS含量为2.0 g时，改性水泥砂浆的抗压强度达到最大值；共聚乳液的掺入，也明显提高了改性水泥砂浆的耐盐性能和抗冻融性；通过SEM微观结构分析可知，掺加适量P(VAc-DBM-AA-AMPS)共聚乳液，水泥砂浆的孔结构得到了明显的改善，形成的网状结构有效改善了水泥石结构与集料的结合形态，使内部结构趋于完善。

Abstract: The effect of poly(VAc-co-DBM-co-AA-co-AMPS) emulsion on the mechanical properties and durability of cement mortars were investigated by compression and tensile experiments. The results indicated that the salt tolerance of emulsion film was improved significantly by introduction of AMPS functional monomer. Meanwhile, the compressive strength of cement mortars was influenced greatly by the dosage of AMPS, and the cement mortars achieved a maximum value in compressive strength when poly(VAc-co-DBM-co-AA-co-AMPS) emulsion contained 2.0 g of AMPS. The salt resistance and freeze-thaw resistance of the modified cement mortar was improved remarkably compared to ordinary concrete. SEM observation indicated that the incorporation of polymeric emulsion could modify the pore-size distribution of cement mortars, and a network structure was formed to improve the interfacial zone between cement paste and aggregate accordingly.

李美兰龚伟师静姚丹吕盼盼刘白玲. P(VAc-DBM-AA-AMPS)共聚乳液的结构特点对水泥砂浆力学性能的影响[J]. 中国塑料, 2019, 33(1): 40-47.

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P(VAc-DBM-AA-AMPS)共聚乳液的结构特点对水泥砂浆力学性能的影响

Effect of Structure Feature of Poly(VAc-DBM-AA-AMPS) Emulsion on Mechanical Properties of Cement Mortars

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