GB/T 21988-2008 in English

《GB/T 21988-2008塑料 氯乙烯均聚和共聚树脂 水中筛分析》由TC15（全国塑料标准化技术委员会）归口，TC15SC7（全国塑料标准化技术委员会聚氯乙烯树脂产品分会）执行，主管部门为中国石油和化学工业联合会。
本标准于１９９２年首次发布。本标准代替ＧＢ／Ｔ１３４５３．１―１９９２《氯乙烯均聚物和共聚物树脂　水中筛析方法》。本标准规定了用水中筛分析测定氯乙烯均聚和共聚树脂筛余物的方法。控制这些特性有助于确保供料与预测的加工性能一致。本标准适用于氯乙烯均聚和共聚树脂、特别是乳液法和微悬浮法聚氯乙烯树脂筛余物的测定。

Scope

This standard specifies the method for sieve analysis and determination of vinyl chloride homopolymer and copolymer resin sieve residues in water. Controlling these characteristics helps ensure that feedstock is consistent with predicted processing properties. This standard applies to the determination of polyvinyl chloride homopolymer and copolymer resins, especially polyvinyl chloride resin residues by emulsion method and microsuspension method.