Coup领 of near infrared spectroscopy to automatic continuous online monitoring of polymerization r
- 上传人: 上海科学仪器有限公司 |大小:568.52KB|浏览:282次|时间:2018-08-31
- 文档简介
- 您可能感兴趣的资料
-
赛默飞Online-GPC-GC/MS法测定蔬菜中的181 种农药残留
-
Scientific newsletter for dielectric spectroscopy
-
Fully Automated Continuous Flow Synthesis
-
Accelerating the Living Polymerization of
-
Efficient Air Pollution Monitoring
-
Online Protein A Affinity-MS for the Analysis of The
-
Electrochemical impedance spectroscopy study of stra
-
Covalently coup领 the antibody on an amine-self-as
-
Perspective on Raman spectroscopy of Graphene
-
AFM-Raman Coup领 and Tip-Enhanced Raman (TERS)
Insitunearinfrared(NIR)spectroscopyisperformedsimultaneouslywithautomaticcontinuousonlinemonitoringofpolymerizationreactions(ACOMP)duringmethylmethacrylatepolymerization.ACOMPisanabsolutetechniquethatfurnishesweightaveragemolecularmassMw,intrinsicviscosity,monomerconversion,andothercharacteristics,whereasNIRfurnishesmonomerconversiondataviaanempiricalcalibration.AnadvantageofinsituNIRisthatitfurnishesimmediateinformationontheconversioninthereactor,whereasACOMPreliesoncontinuouswithdrawalanddilutionofasmallstreamofreactorfluid,sothatthereisalagtimeofseveralminutesbetweenwhatACOMPreportsandwhatisoccurringinthereactor.SimultaneousmonomerconversiondatafrominsituNIRandACOMP,thelatterderivedfrombothrefractiveindexandUVabsorption,arecomparedandfoundtobeingoodagreement.TheevolutionofconversionkineticsandMwgenerallyconformtothepredictionsoftheQuasi-SteadyStateApproximation.Havingestablishedtheagreementbetweenthemethods,thepathisnowopenforcombiningNIRwithACOMPtocharacterizeincreasinglycomplexsystems,suchascopolymerizationwithtwoormoremonomericspecies,thatarenotfeasiblebyeithertechniqueseparately.
标签: