波谱学杂志2018，Vol.35Issue(1)：60-74,15.DOI:10.11938/cjmr20172590
通过高斯加权的1H CPMG弛豫曲线测定橡胶交联密度
Measurement of Crosslinking Density of Rubbers by Analyzing Gaussian-Weighted CPMG Relaxation Curves
摘要
Abstract
CPMG sequence is widely used to measure crosslink density of rubber.However,the crosslink density obtained by this technique has a strong dependence on the interval times between the pulses in CPMG sequence,and the results measured have only a weak correlation with rubber hardness.To overcome this shortcoming,we proposed in this work to construct a 1H T2 relaxation curve by summing Gaussian-weighted CPMG relaxation curves acquired at by varying the interval time between the pulses in CPMG sequence.Using the multi-echo Gaussian-weighted relaxation curve to calculate the crosslink density gave results that had greatly improved correlation with the rubber hardness.The new method was also fast and efficient,as it took only one-tenth of the experimental time required for the conventional 1H double quantum NMR (1H DQ NMR) experiment.关键词
1H CPMG/高斯加权求和/1H DQ NMR/交联密度/橡胶Key words
1H CPMG/Gaussian-weighted summation/1H double quantum NMR (1H DQ NMR)/crosslink density/rubber分类
数理科学引用本文复制引用
高鹏飞,褚琳琳,杨翼,江纪锋,王嘉琛,姚叶锋,周兵..通过高斯加权的1H CPMG弛豫曲线测定橡胶交联密度[J].波谱学杂志,2018,35(1):60-74,15.基金项目
国家自然科学基金资助项目(21574043,41572103) （21574043,41572103）
国家重点基础研究发展计划(“973计划”)资助项目(2013CB921801) （“973计划”）
上海市科委资助项目(15142200500) （15142200500）
华东师范大学科研创新基金资助项目. （）
