GPC联用粘度计——Ⅰ、实验装置

GPC联用粘度计——Ⅰ、实验装置 GPC COMBINED WITH VISCOMETRY Ⅰ. THE EXPERIMENTAL APPARATUS 程叔耀 Cheng Shuyao Tian Bingshou Fu Gongcheng Han Kemin first-author 田炳寿 付功成 韩可敏 <正> 一、引言 GPC直接联用粘度计,对于扩大GPC的应用范围（如对高聚物支化的研究等）以及更加方便于对GPC柱组进行标定等方面,具有很大的用途。但是,由于GPC流出的各个级份的浓度较小,而且相邻级份之间的浓度差别亦不会很大,所以,如欲精确地测定各个级份的特性粘度,则对于各个级份在毛细管粘度计中流出时间的测量精确度以及温度的控制要求很高,实验技术上有较大的困难。因此,从64年Moore提出了GPC以来,在大量的GPC文献中,这方面的报导[1-7]并不很多;在国内尚未见到类似的报导。本文利用在GPC仪器的虹吸管下面直接联用毛细管粘度计,在恒温下,装在毛细管粘度计上的二个光敏管,当溶液流经时所给出的讯号,传给石英振荡毫秒计时器,自动记录每一虹吸级份在粘度计中的流出时间,达到了能够满足测量要求的精确度。 The paper describes the capillary viscometer which is combined with the instrument of GPC （SN—01 Model）for expanding its application. Solvent used is THF, The Syphon and the viscometer were kept at the constant temperature of 25±0.01℃, The flow time in theviseometer is about 84 sec, for pure solvent, The accuracy of the flow time can arrive at±0.005 sec, We repeatedly measured the sample of unfraetionated polystyrene, The result shows that the experimental apparatus of the GPC which is combined directly with the viscometer by our designing is completely in keeping with requirements in both reproducibility and precision. 1981-03-01 2021-04-01 3