核磁共振氢谱法在聚羧酸减水剂大单体表征中的应用  

Analysis of Polycarboxylate Superplasticizer for Macromonomer by Nuclear Magnetic Resonance Spectrometry

作　　者：林倩 李格丽 郑荣平[2] 方云辉[2] 

机构地区：[1]科之杰新材料集团有限公司,福建厦门361100 [2]厦门市建筑科学研究院集团股份有限公司,福建厦门361100

出　　处：《精细化工》2015年第4期470-474,共5页Fine Chemicals

摘　　要：对常见的4种聚氧乙烯醚大单体进行了核磁共振氢谱法(1HNMR)分析,并以此为依据建立了1HNMR技术快速、准确地检测大单体的方法,实现对聚羧酸减水剂中残留大单体的定性分析。采用该法,确认了各大单体1HNMR的谱峰归属,并根据大单体的特征峰计算其数均分子量大小。同时,利用1HNMR法对聚酯类减水剂的酯化反应中酯化率和双键保留率两个重要指标进行测定。结果表明,该法准确、快速、简便,适用于聚羧酸减水剂中大单体的快速鉴定。A rapid,accurate nuclear magnetic resonance（^1HNMR） spectrometric technique was developed for the qualitative analysis of polyoxyethylene ether macromonomers in polycarboxylate superplasticizers.The main characteristic peaks in the ^1HNMR spectra of macromonomer were assigned,and the molecular weight was obtained by ^1HNMR signal component analysis.Meanwhile,the esterification rate and residual rate of double bond were detected by ^1HNMR in esterification reaction.The experimental results confirmed that ^1HNMR spectroscopy can be used to quantify the structures of macromonomer in polycarboxylate superplasticizers.

关 键 词：大单体 ^1HNMR 聚羧酸减水剂 定性分析 分子量 酯化率 双键保留率 建筑用化学品 

分 类 号：TU528.01[建筑科学—建筑技术科学]