Lochab Bimlesh, Monisha Monisha, Amarnath Nagarjuna, Sharma Pratibha, Mukherjee Sourav, Ishida Hatsuo
Materials Chemistry Laboratory, Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Gautam Buddha Nagar, Uttar Pradesh 201314, India.
Department of Polymer Science and Engineering, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India.
Polymers (Basel). 2021 Apr 13;13(8):1260. doi: 10.3390/polym13081260.
Due to their outstanding and versatile properties, polybenzoxazines have quickly occupied a great niche of applications. Developing the ability to polymerize benzoxazine resin at lower temperatures than the current capability is essential in taking advantage of these exceptional properties and remains to be most challenging subject in the field. The current review is classified into several parts to achieve this goal. In this review, fundamentals on the synthesis and evolution of structure, which led to classification of PBz in different generations, are discussed. Classifications of PBzs are defined depending on building block as well as how structure is evolved and property obtained. Progress on the utility of biobased feedstocks from various bio-/waste-mass is also discussed and compared, wherever possible. The second part of review discusses the probable polymerization mechanism proposed for the ring-opening reactions. This is complementary to the third section, where the effect of catalysts/initiators has on triggering polymerization at low temperature is discussed extensively. The role of additional functionalities in influencing the temperature of polymerization is also discussed. There has been a shift in paradigm beyond the lowering of ring-opening polymerization (ROP) temperature and other areas of interest, such as adaptation of molecular functionality with simultaneous improvement of properties.
由于其优异且多样的性能,聚苯并恶嗪已迅速占据了大量应用领域。开发在比当前能力更低的温度下聚合苯并恶嗪树脂的能力,对于利用这些优异性能至关重要,并且仍然是该领域最具挑战性的课题。为实现这一目标,本综述分为几个部分。在本综述中,讨论了导致聚苯并恶嗪分为不同代的结构合成与演变的基本原理。聚苯并恶嗪的分类取决于构建单元以及结构如何演变和性能如何获得。还尽可能讨论并比较了来自各种生物/废物原料的生物基原料的应用进展。综述的第二部分讨论了为开环反应提出的可能的聚合机理。这与第三部分互补,在第三部分中广泛讨论了催化剂/引发剂对低温引发聚合的影响。还讨论了其他官能团在影响聚合温度方面的作用。除了降低开环聚合(ROP)温度之外,在范式上已经发生了转变,还有其他感兴趣的领域,例如分子官能团的适配以及性能的同时改善。