瓶用PET树脂黏度测试标准的修订建议  

Revise suggestion on bottle-grade PET resin viscosity measurement standard

作　　者：陈锦国[1] 李然[1] 李红华[1] 夏林密 

机构地区：[1]中国石化仪征化纤股份有限公司瓶片生产中心,江苏仪征211900

出　　处：《合成纤维工业》2014年第3期69-73,共5页China Synthetic Fiber Industry

摘　　要：针对瓶用聚对苯二甲酸乙二醇酯（PET）树脂现行国家标准GB17931-2003黏度分析方法的重复性和再现性差，参照ASTM，ISO相关国际标准，对GB17931—2003有关内容的修订提出建议。修订的主要内容有：试样粉碎采用全粉碎或压片方式；粉碎后的试样需进行干燥处理，用丙酮清洗除去其表面水分，在100℃烘箱中放置10～15min，以除去剩余丙酮；试样在110℃条件下溶解一般不超过30min，超过45min需要重新制样，溶解使用油浴，也可以采用等效的装置，控制溶液温度（110±5）℃；黏度计毛细管内径为0．8～0．9mm，试样溶液浓度为0．005g／mL；溶剂采用苯酚／四氯乙烷质量比为1：1和3：2两种体系；将相对黏度仪法纳入标准。Whereas the poor repeatability and reproducibility of the viscosity testing method for polyethylene terephthalate （PET） specified in the existing national standard GB17931 -2003, some revise suggestion was proposed on the relative content of GB17931 -2003 referring to the international ASTM and ISO standards. The revised content dominantly comprises： the sample is crushed by fully grinding or tabletting; the crushed sample is cleaned with acetone to remove the water from the surface and dried in an oven for 10 - 15 min at 100 ℃ ; the sample dissolving process is required to be less than 30 min at 110 ℃, and the sample should be reproduced if the dissolving time is over 45min ; oil bath or an equivalent device is recommended for the dissolving process, and the solution temperature should be controlled as （ 110 ± 5 ） ℃ ; the capillary inner diameter of the viscometer is 0.8 - 0.9 mm, and the solution concentration is 0.005 g/mL ; the solvent system should be the mixture of phenol and tetrachloroethane at the mass ratio of 1 ： 1 or 3 ： 2 ; and the testing method using relative viscosity meter is involved in the standard.

关 键 词：聚对苯二甲酸乙二醇酯 瓶用树脂 黏度 国家标准 修订 建议 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]