生活中有什么常见的固体分散剂(化学)拜托了各位 谢谢

是分散剂不是分散质
2025-04-07 02:46:29
推荐回答(1个)
回答1:

石蜡类 尽管石蜡属于外润滑剂, 但为非极性直链烃,不能润湿金属表面, 也就是说不能阻止聚氯乙烯等树脂粘连金属壁, 只有和硬脂酸、硬脂酸钙等并用时, 才能发挥协同效应 液体石蜡: 凝固点-15 ̄-35℃, 在挤出和注射成型加工时, 与树脂的相容性较差,添加量一般为0.3%-0.5%, 过多时, 反而使加工性能变坏 微晶石蜡: 由石油炼制过程中得到, 其相对分子质量较大, 且有许多异构体, 熔点65-90℃, 润滑性和热稳定性好, 但分散性较差, 用量一般为 0.1%-0.2%, 最好与硬脂酸丁酯、高级脂肪酸并用 金属皂类 高级脂肪酸的金属盐类, 称为金属皂,如硬脂酸钡(BaSt)适用于多种塑料,用量为 0.5%左右;硬脂酸锌(ZnSt) 适于聚烯烃、ABS等,用量为0.3%; 硬脂酸钙(CaSt)适于通用塑料,外润滑用,用量 0.2% ̄1.5%; 其他硬脂酸皂如硬脂酸镉(CdSt)、硬脂酸镁(MgSt)、硬脂酸铜(CuSt)

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