• 作者： 羅世農
• 作者服務機構： 榮民總醫院醫學研究部
• 中文摘要： 本研究觀察非離子表面活性劑polyoxyethylene glycol monoethers of n-hexadecanol影響下聚苯乙烯粒子懸液劑的沈澱容積，搖散程度及外觀。 在低非離子表面活性劑濃度時，獲得一硬餅化懸液劑，這是可能由於未被表面活性劑分子覆蓋的粒子表面互相吸引或吸附的表面活性劑分子與未被覆蓋的表面互相吸附所致。在高非離子表面活性劑濃度時，搖散程度會受阻礙排斥力的影響。
• 英文摘要： The sedimentation volume, redispersibility and appearance of a polystyrene latex suspension in thepresence of nonionic surface active agent of polyoxyethylene glycol monoethers of n-hexadecanol havebeen investigated. At low concentrations of nonionic surface active agents, hard caked suspensions were found. This isprobably due to the attraction between the uncoated areas or the mutual adsorption of the adsorbed mole-cules on the bare surface of the particles in the sediment. At high concentrations of nonionic surface activeagents, the redispersibility of the particles was affected by the steric repulsive force.
• 中文關鍵字： suspension; nonionic surpace active agent
• 英文關鍵字： --