【作者】 吴泰琉； 王力平； 孙尧俊；

【Author】 Wu Tai-liu Wang Li-ping Sun Yao-jun (Center for analysis and Measurement,Fudan University,Shanghai 200433,China)

【机构】 复旦大学分析测试中心；

【摘要】 <正>MBS 是 PVC 塑料的增韧剂,可以增加 PVC 的透明度和提高它的强度。国产 MBS 在产量上不能满足需要,且性能与进口 MBS 相比仍有一些差距,因此 MBS 仍有相当的进口数量。为了加强对该产品进口的监管,使之能做到公平、公正、合理地收取关税,受上海海关委托, 建立了用 NMR 测定 MBS 中各组分含量的新方法。更多还原

【Abstract】 A novel method was established for measuring the content of components in MBS.Two imported standard MBS samples（Standard sample 1^#:PS08-SBdMMA;Standard sample 2^#: P4265-SBdMMA）and one domestic MBS sample were measured using liquid ¹H NMR,¹³C NMR and solid-state high resolution ¹³C NMR,respectively.Upon doing the solid-state NMR experiment, T₁ values for each sample were first measured,and then the solid-state ¹³C NMR experiment was done,M₀ was calculated using an equation of M=M₀(1-e^-D1/Tl).The T₁ values and compositions for the MBS samples are presented in Table 1 & 2,respectively.The results obtained from L ¹H NMR,L ¹³C NMR and S ¹³C NMR are essentially coincident with the corresponding values calculated（see Table 2）.All the errors are less than 5% and the results are satisfying.When MBS is soluble in a solvent,it would be very convenient for us to measure the content of components using liquid ¹H NMR.It is also feasible to measure the content using solid-state ¹³C NMR when MBS is unsoluble in a solvent,but the experiment will take 48 hrs.更多还原