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丙烯酰胺聚合物的制备及性能评价

作者：唐修生1，3，4，温金保1，3，4，刘兴荣2，徐志峰1，3，4，杜志芹2

关键字：丙烯,酰胺,聚合物,的,制备,及,性能,评价,南京,

　
（1．南京水利科学研究院，江苏 南京  210029；2.南京瑞迪高新技术有限公司，江苏 南京  210024； 3.水利部水工新材料工程技术研究中心，江苏 南京  210024；4．安徽瑞和新材料有限公司 安徽省院士工作站，安徽 马鞍山  243000）
    摘要：以丙烯酰胺、丙烯酸为主料，在反应温度为50、45、35和30 ℃条件下制备了系列丙烯酰胺聚合物50HP、45HP、3 HP和30HP，研究其与聚羧酸系减水剂的相容性、对净浆和混凝土泌水等性能的影响。结果表明：该丙烯酰胺聚合物与聚羧酸系减水剂具有良好的相容性，不分层、不变色、不产生絮状物；与市售聚丙烯酰胺相比，相同掺量条件下，50HP、45HP、3 HP和30HP在增稠能力、降低泌水率、改善混凝土包裹性等方面具有明显的优势；当折固掺量为5×10-5时，合成产品对混凝土的含气量基本无影响，并可显著降低混凝土的泌水率，降幅达75%以上，而市售产品的降幅仅为10%左右。
    关键词：丙烯酰胺聚合物；聚羧酸系减水剂；泌水率
    中图分类号：TU528.042        文献标识码：A        文章编号：1001-702X（2020）12-0135-05
 
Preparation and performance evaluation of acrylamide polymers
TANG Xiusheng1，3，4，WEN Jinbao1，3，4，LIU Xingrong2，XU Zhifeng1，3，4，DU Zhiqin2
（1.Nanjing Hydraulic Research Institute，Nanjing 210029，China；2.Nanjing R&D Hi-Tech Co. Ltd.，Nanjing 210024，China；3.Research Center on New Materials in Hydraulic Structures of Ministry of Water Resources，Nanjing 210024，China；4.Academician Workstation，Anhui Ruihe New Materials Co. Ltd.，Maanshan 243000，China）
    Abstract：A series of acrylamide polymers（50HP，45HP，35HP and 30HP） were synthesized with acrylamide and acrylic acid as the main materials at 50，45，35 and 30 ℃. Its compatibility with polycarboxylate superplasticizer and effect on properties of paste and concrete were studied. The results show that arcylamide polymers have good compatibility with polycarboxylate water reducing agent，and there are no separation，no discoloration and no floccules. Compared with the commercial polyacrylamide，the 50HP，45HP，35HP and 30HP have obvious technical advantages under the condition of the same solid addition，such as better thickening ability，bleeding rate reducing and concrete wrapping improving ability. When the solid addition is 5×10-5，the synthetic products have no obvious effects on the air content of concrete，and significantly reduce the bleeding rate of concrete which is more than 75%. However，the bleeding rate of concrete reduced by the commercial polyacrylamide is only about 10%. 
    Key words：acrylamide polymers，polycarboxylate superplasticizer，bleeding rate