Direct and Indirect Functionalization of Polypropylene

Abstract

Polypropylene is the polymer with the fastest‐growing usage rate, owing to its low price combined with properties that have been improved over recent years. However, because it does not carry any functional groups, it has little interaction with useful components of many systems, and it is difficult to paint. Recently, a certain number of attempts have been made to modify this polymer, either through direct copolymerization with reactive monomers, or after chemical modification of the polymer itself or some of its copolymers. The paper is a review of these different approaches, with emphasis on two points: (a) the new possibilities offered by the metallocene family of catalysts and (b), the work carried out in the author's laboratory, based on various functionalizations of copolymers of propylene and dienes.

Controlled, Copper-Catalyzed Functionalization of Polyolefins

“…2 However, in the case of polyolefins, this methodology becomes a challenge due to the lack of reactive functional groups. Previous work has been mainly focused on polypropylene, 3,4 for which several procedures have been developed. Most are radical-based initiated by peroxide decomposition at high temperatures.…”

Funcionalização do Polipropileno com Viniltrietoxisilano em Solução e no Estado Fundido

“…O polipropileno (PP) foi o polímero que apresentou o maior crescimento em aplicações comerciais na últi-ma década e, provavelmente, esta situação deve se manter durante algum tempo [1] . Baixo custo, performances similares às de muitos materiais de engenharia, facilidade de processamento e reciclagem são algumas das razões que fazem com que o PP ocupe uma posição de destaque entre os polímeros sintéticos.…”

Functionalization of Poly (1‐hexene) with Maleic Anhydride: The Effect of Reaction Parameters

“…In this case, free radicals on the chains have a possibility for undergoing undesirable reactions such as crosslinking or degradation (reduction ofmolecular weight), which reduces the quality of the final product. [15,19,22] Numerous researches have been carried out on the factors affecting post-polymerization functionalization. For instance, Abacha et.…”

“…Post‐polymerization modification is one of the most common methods for functionalization of polyolefin chains. In this method, initially, polyolefin is produced with the desired properties, then through different methods such as using peroxides (the most common) and radiation, free radicals are created on polymer chains [6,19–21] . The intended functional monomers can react with these free radicals and be positioned on polymer chains.…”

“…In this method, initially, polyolefin is produced with the desired properties, then through different methods such as using peroxides (the most common) and radiation, free radicals are created on polymer chains. [6,[19][20][21] The intended functional monomers can react with these free radicals and be positioned on polymer chains. The drawback of this method is formation of free radicals and lack of well control on by-products and side reactions.…”