氯化银光引发聚合制备单分散聚苯乙烯微球

doi:10.11901/1005.3093.2016.098

材料研究学报

2016, Vol. 30

Issue (11): 868-874 DOI: 10.11901/1005.3093.2016.098

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氯化银光引发聚合制备单分散聚苯乙烯微球

杨莹,赵岩,颜雨坤,张劲松

中国科学院金属研究所沈阳 110016

AgCl Nano-cubics Used as Photoinitiator for Polymerizing Monodispersed Polystyrene Microspheres

Ying YANG,Yan ZHAO,Yukun YAN,Jinsong ZHANG

Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

引用本文:

杨莹,赵岩,颜雨坤,张劲松. 氯化银光引发聚合制备单分散聚苯乙烯微球[J]. 材料研究学报, 2016, 30(11): 868-874.
Ying YANG, Yan ZHAO, Yukun YAN, Jinsong ZHANG. AgCl Nano-cubics Used as Photoinitiator for Polymerizing Monodispersed Polystyrene Microspheres[J]. Chinese Journal of Materials Research, 2016, 30(11): 868-874.

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摘要:

以氯化银颗粒为光引发剂, 以聚乙烯吡咯烷酮(PVP)为分散稳定剂, 在紫外光辐照下引发苯乙烯单体聚合制备了单分散的聚苯乙烯微球。用扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)等手段对光诱导聚合产物进行了表征, 用差示扫描量热仪(DSC)测试了聚苯乙烯微球的玻璃化转变温度。反应动力学研究表明, 这种聚合反应符合一级反应动力学特征; 反应机理研究证明, 该聚合反应属于自由基聚合, 乙氧基自由基(CH₃CH₂O)为引发聚合反应的活性基团。在紫外光的照射下, 这种氯化银立方体颗粒具有一定的稳定性。

关键词 ：有机高分子材料, 氯化银, 光引发, 聚苯乙烯微球, 聚合

Abstract：

Mono-dispersed polystyrene microspheres were prepare by UV irradiation assisted polymerization of styrene monomer with AgCl nano-cubic particles as photoinitiator and polyvinylpyrrolidone (PVP) as dispersion stabilizer. The morphology, molecular structure and glass transition temperature of the polymers were characterized by SEM, FT-IR and DSC respectively. From the polymerization dynamics, it follows that the photopolymerization process was a first order reaction. The photopolymerization reaction could be identified as a kind of free radical polymerization, while CH₃CH₂O was the active group in the photopolymerization. Besides, AgCl nano-cubic particles were stable under UV irradiation.

Key words： organic polymer materials AgCl photoinitiate polystyrene microspheres polymerize

收稿日期: 2016-02-16

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.098 或 https://www.cjmr.org/CN/Y2016/V30/I11/868

图1 AgCl颗粒的SEM形貌和粒径分布曲线

图2 36W紫外灯辐照不同时间AgCl纳米颗粒溶胶的数码照片

图3 紫外光照10 min氯化银纳米颗粒的SEM照片

图4 紫外光照射后AgCl的XRD谱图

图5 光引发聚合制备的聚苯乙烯微球的SEM照片和粒径分布柱状图

图6 聚苯乙烯的红外光谱

图7 光引发聚合和普通热引发聚合的聚苯乙烯微球的DSC曲线

表1 聚苯乙烯不同反应时间的GPC分子量

图8 苯乙烯的光聚合反应动力学曲线

表2 AgCl紫外光引发苯乙烯聚合反应

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