Well-Defined Polymers for Nonchemistry Laboratories using Oxygen Tolerant Controlled Radical Polymerization,Journal of Chemical Education

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Well-Defined Polymers for Nonchemistry Laboratories using Oxygen Tolerant Controlled Radical Polymerization
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2020-01-02 , DOI: 10.1021/acs.jchemed.9b00922
Zihao Li _{1,

2,

3} , Sylvia Ganda _{1,

3} , Daniele Melodia _{1,

3} , Cyrille Boyer _{1,

2,

4} , Robert Chapman _{1,

2,

3}

Affiliation

We present the use of an oxygen tolerant controlled radical polymerization (photoinduced electron/energy transfer–reversible addition fragmentation chain transfer polymerization, PET-RAFT) as a simple method for preparing controlled radical polymers in an undergraduate laboratory. Unlike conventional techniques, PET-RAFT polymerizations require no deoxygenation, heating, or special equipment. This removes hazards and complexity from the experimental setup, as well as sources of error and variability in the polymers produced. In this program, students used PET-RAFT to synthesize poly(N-isopropylacrylamide) coated gold nanoparticles and studied the effect of the polymer on the size, optical properties, and aggregation state of the nanoparticles in response to temperature. In parallel, students used PET-RAFT to study the chemistry of radical copolymerization by measuring the reactivity ratios of a range of vinylic monomers. Both experiments would be very difficult to perform in an undergraduate laboratory by conventional controlled radical polymerization techniques. The PET-RAFT technique we present can be used to prepare well-defined polymers easily for any number of applications beyond this, particularly in materials, biology, engineering, and physics laboratories that are not set up for complicated polymer synthesis.

中文翻译：

非化学实验室使用耐氧控制的自由基聚合反应制备的精细聚合物

我们介绍了在大学实验室中使用耐氧受控自由基聚合（光致电子/能量转移-可逆加成断裂链转移聚合，PET-RAFT）作为制备受控自由基聚合物的简单方法的方法。与常规技术不同，PET-RAFT聚合不需要脱氧，加热或特殊设备。这消除了实验设置中的危险和复杂性，并消除了所生产聚合物的误差和变异性来源。在这个程序中，学生使用PET-RAFT合成聚（Ñ-异丙基丙烯酰胺）涂覆的金纳米颗粒，并研究了聚合物对纳米颗粒的尺寸，光学性质和响应温度的聚集状态的影响。同时，学生们使用PET-RAFT通过测量一系列乙烯基单体的反应率来研究自由基共聚的化学反应。通过常规的受控自由基聚合技术，这两个实验将很难在本科实验室中进行。我们目前提供的PET-RAFT技术可用于轻松地制备定义明确的聚合物，以用于除此以外的任何其他应用，尤其是在尚未建立复杂聚合物合成的材料，生物学，工程和物理实验室中。

更新日期：2020-01-02

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