| | 加工定制：是 | | 品牌：翔鹰技术 | | 型号：XiangyingGC7990plus | |
| | 测量范围：ppm | | 测量对象：PTT中的DPG含量 | | 控温范围：400 ℃ | |
| | 功率：2000 w | | 尺寸：480 mm | | 重量：46 kg | |
| | 甲醇：PTT中的DPG含量 | | 乙醇：聚对苯二甲酸丙二酯 | | 乙二醇： 1,3-二丙二醇 | |
| | 异丙醇：1,6-己二醇 | | 合成氨：硫磺回收 | | | |
In the process of synthesizing PTT, 1, 3 - two propylene glycol (DPG) is usually produced by the side product, which is combined with the monomer in the polyester chain. Due to the existence of the ether bond, the chemical structure of the original PTT macromolecular regular damage, so as to reduce the force between the molecules, and leads to the decrease of the melting point, on products of oxidation resistance, heat and light properties have adverse effects
Tengzhou City Xiangying Analysis Technology Co., Ltd. R & D XiangyingGC7990plus gas chromatograph, by capillary gas chromatography was used to determined poly trimethylene terephthalate (PTT) 1,3 dipropylene glycol (DPG) content, with ethanolamine degradation method of PTT macromolecular degradation process, selection of the capillary column and hydrogen flame detector, and 1,6 hexanediol as internal standard. The results show that the minimum detection limit of DPG is 0.05%, the relative standard deviation is 0.78%, the average recovery rate is 100.3%
在合成 PTT过程中 ,通常会产生 1 ,3 -二丙二醇 (简称 DPG)的副产物 ,这种醚以共聚单体方式结合在聚酯链中 。由于醚键的存在 ,使原有PTT大分子规整的化学结构受到破坏 ,从而降低了大分子之间的作用力 ,导致熔点下降 ,对产品的耐氧化、耐热和耐光等性能都有不利的影响
滕州市翔鹰分析技术有限公司研发出XiangyingGC7990plus气相色谱仪，采用毛细管气相色谱法测定了聚对苯二甲酸丙二酯 ( PTT)产品中 1,3-二丙二醇 ( DPG)的含量 ,用乙醇胺降解法对 PTT大分子进行降解处理 ,选用了毛细管柱 ,氢火焰检测器 ,并用 1,6-己二醇作内标。结果表明 ,DPG的***低检测限为 0 .0 5 % ,相对标准偏差为 0 .78% ,平均回收率为10 0 .3%
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