Page 62 - 《橡塑技术与装备》2018年16期（8月下半月 塑料版）

橡塑技术与装备（塑料） CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT (PLASTICS)

Synthesis of polystyrene microspheres by soap free emulsion
polymerization

Hao Miaoqin
(China Inspection and Evaluation Technology Co. LTD., Xi’an 710065, Shaanxi, China)

Abstract: In this paper, polystyrene microspheres emulsion was synthesized by soap free emulsion
polymerization, and the latest research trends and applications of soap free emulsion polymerization were
introduced and summarized. In order to obtain the favorable conditions for the preparation of monodisperse
microspheres, the effects of the reaction temperature, the amount of monomer, the amount of initiator
and the reaction time on the particle size and particle size distribution of polystyrene microspheres were
investigated in the soap free emulsion polymerization system. At the same time, the polystyrene microspheres
were characterized by transmission electron microscopy (TEM). In order to obtain the favorable conditions
for the preparation of monodisperse microspheres, the effects of the reaction temperature, the amount
of monomer, the amount of initiator and the reaction time on the particle size and particle size distribution
of polystyrene microspheres were investigated in the soap free emulsion polymerization system. At the
same time, the polystyrene microspheres were characterized by transmission electron microscopy (TEM). The
experimental results showed that PS microspheres with uniform size and good monodispersibility can be prepared
by soap free emulsion polymerization; When the reaction temperature was in the range of 80~95 ℃ , the diameter
of microspheres decreased with the increase of temperature, and the particle size range was between
300~500 nm; The emulsion of polystyrene microspheres with different size could be prepared by changing the
amount of monomer. Changing the amount of initiator was also an effective way to prepare microspheres
with different diameters. Prolonging the polymerization time was mainly to improve the conversion rate, but
had little effect on the polymerization degree of the microspheres.
Key words: soap free emulsion polymerization; polystyrene microsphere; particle size range; degree of
polymerization
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日本制纸研发出的纸产品可完美替代塑料袋包装
The paper products developed in Nippon Paper can be used instead of plastic bag packaging

2018 年 7 月 23 日，据日本 NHK 电视台报道，为了缓解日本塑料制品造成的环境污染困境，许多企业纷纷
开始采取相关措施。例如，美国的星巴克公司宣布，全球的店铺将逐步停止使用一次性塑料吸管，并用可降解材
质的产品进行替换等。
日本的一些相关厂商也积极采取相应措施。其中，大型造纸厂商日本制纸公司开发出了一种可以取代塑料袋
包装的炸土豆片、谷物食品等的纸。因为这种纸进行了一些特殊工序的加工，所以具备着一定的防水以及密封方
面的功能，可以替代部分的食品包装。
日本制纸公司表示，由于上述新型产品的订单在持续增加中，该公司计划下月会成立一个新部门，专门负责
取代塑料的纸制品的研发以及销售方面的工作。该公司的营业企划部长长知明表示 ： “ 我们将会积极采取相关的
措施，满足客户对于塑料替代材料的需求。”
那么在如何解决塑料制品造成的环境污染问题上，日本将会发挥怎样的作用，令我们关注。
摘编自 “ 中国聚合物网 ”
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·46· 第 44 卷 第 16 期