Abstract：
The problem of plastic waste in the environment calls for the development of new polymeric materials designed specifically for easy recycling at the end of their life cycle. Herein, a green polymer system comprising a series of necklace-shaped polydimethylsiloxanes bearing anthracene dimer units is developed. The polymers have low environmental impact and are easily recycled. Further, their flexibility and glass transition temperatures are easy to control. These necklace-shaped inorganic polymers are synthesized by photopolymerizing (dimerizing) anthracene-terminated oligo-dimethylsiloxane monomers. A key achievement of the present work is the successful chemical recovery of the monomers from the polymers through thermal depolymerization, enabling monomer-polymer recycling. By applying equilibrium polymerization with base catalysts, monomers with a controlled distributed chain length are synthesized from monomers with a constant chain length. The necklace-shaped polymers synthesized from these randomized monomers have amorphous structures and readily form transparent films. It is possible to modulate the thermal and mechanical properties of the polymers by controlling the average chain length of the polydimethylsiloxane between the anthracene dimers. This investigation presents a method for the synthesis and cyclic utilization of polymer materials with a wide range of applications, including plastics and elastomers.
摘要：
环境中的塑料废物问题要求开发新的聚合物材料，专门设计用于在其生命周期结束时易于回收。在这里，开发了包括一系列带有蒽二聚体单元的项链状聚二甲基硅氧烷的绿色聚合物体系。该聚合物具有低的环境影响并且易于回收。Further,其灵活性和玻璃化转变温度易于控制。这些项链状无机聚合物是通过光聚合（二聚）蒽封端的低聚二甲基硅氧烷单体合成的。本工作的一个关键成就是通过热解聚从聚合物中成功地化学回收单体。使单体-聚合物回收。通过使用碱性催化剂进行平衡聚合，具有受控分布链长的单体由具有恒定链长的单体合成。由这些无规单体合成的项链状聚合物具有无定形结构并容易形成透明膜。可以通过控制蒽二聚物之间的聚二甲基硅氧烷的平均链长来调节聚合物的热和机械性能。这项研究提出了一种具有广泛应用的聚合物材料的合成和循环利用方法，包括塑料和弹性体。
