采用半连续乳液聚合法合成了具有核壳结构的苯丙乳液，考察了玻璃化转变温度（ Tg）、核中丙烯酸的用量、亲水单体用量及种类对乳液冻融稳定性的影响。结果表明： Tg在 20.94 ℃左右、核中丙烯酸的用量为 2.5%时，苯丙乳液的冻融稳定性较好，不同亲水单体和用量对冻融稳定性的影响不大，也表明了在该体系下丙烯酸已为乳液提供了足够的冻融稳定性。
The styrene-acrylic latex with core-shell structure was synthesized by semi-continuous emulsion polymerization. The effects of glass transition temperature（Tg），amount of acrylic acid in the core，amount and types of hydrophilic monomer on the freeze-thaw stabilityof the latex were investigated. When the Tg was about 20.94 ℃ and the amount of AA in the core was 2.5%，the freeze-thaw stability of the styrene-acrylic latex was better. The differenthydrophilic monomers and dosage presented little effect on the freeze-thaw stability，which al. so indicated that AA provided sufficient freeze-thaw stability to the latex system.
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