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首页> 外文期刊>Rubber World: The Technical Service Magazine for The Rubber Industry >Online monitoring of styrene butadiene copolymerization,including a final coupling reaction
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Online monitoring of styrene butadiene copolymerization,including a final coupling reaction

机译：在线监测苯乙烯丁二烯共聚，包括最终偶联反应

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摘要

Automatic continuous online monitoring of polymerization reactions(ACOMP)was successfully used to continuously measure the anionic polymerization of styrene butadiene rubber(SBR)at the 20 L scale.The conversion was tracked,along with weight average molecular weight(Mw),and low and high shear reduced viscosities(RV).The ACOMP data provided real time reaction kinetics via conversion rates.After the initial reaction,the effects of the coupling agent were directly monitored by ACOMP.This showed a doubling of Mw over a short period of time,and increases in RV commensurate with what one expects for random coils in a good solvent.The signatures of the various quantities versus time will be useful to establish the range of reaction trajectories that will produce a desired product.ACOMP can also monitor changes in these quantities as they occur,due to fluctuations in reaction conditions,such as pressure and temperature,addition of monomers,chain transfer agents,catalyst,crosslinking agents,etc.This leads to the potential for real time reaction control,which might include optimization of the end point of the first phase,triggering the coupling stage and ending the coupling stage,among others.The ultimate goal of utilizing ACOMP data is to monitor and control polymer manufacturing at the industrial scale,leading to improved production efficiencies and minimum off-specification product.Additionally,ACOMP can be used for the discovery and scale up of new products as they are developed.
机译：成功地使用自动连续在线监测聚合反应（ACOMP），以连续测量20L级别的苯乙烯丁二烯橡胶（SBR）的阴离子聚合。跟踪转化率，重均分子量（MW）和低高剪切减少粘度（RV）。ACOMP数据通过转化率提供实时反应动力学。初始反应后，通过ACOMP直接监测偶联剂的效果。在短时间内显示了一倍的MW， RV的增加与良好溶剂中的随机线圈的预期增加。各种数量与时间的签名对于建立产生所需产品的反应轨迹范围是有用的.Acomp也可以监测这些数量的变化由于它们发生，由于反应条件的波动，例如压力和温度，加入单体，链转移剂，催化剂，交联剂等。这导致了实时反应控制的可能性，这可能包括优化第一相的终点，触发耦合级并结束耦合级等。利用ACOMM数据的最终目标是监控和控制聚合物在工业规模的制造业，导致生产效率提高和最低规格产品。加盟，ACAMP可用于发现和扩展新产品。

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