Controlled/living carbocationic copolymerization of isobutylene with alloocimene

Abstract

The first example of a living carbocationic polymerization in emulsion is presented. Isobutylene was copolymerized with alloocimene, a tri‐terpene. AFM, TEM, and DSC analysis demonstrated a phase separated nanostructure. NMR and TGA revealed the presence of a diblock structure in the material that displayed thermoplastic elastomeric properties with 6 MPa tensile strength and 1000% strain at break. Triblocks were also prepared by sequential monomer addition, yielding 12 MPa tensile strength with 640% strain at break.

Synthesis, characterization and properties of a bio-based elastomer: polymyrcene

“…4 On the other hand, terpenes or terpenoids refer to one of the largest families of naturally occurring compounds and are secondary metabolites synthesized mainly by plants, particularly conifers. 8 To make use of the chemical functionalities (unsaturation, functional groups) present in terpene molecules, various chemical strategies and a wide range of polymerisation techniques [9][10][11][12][13][14][15][16][17][18][19] had been studied. Thus, due to their abundance in nature, there has been great interest in producing polymers with terpenes as either functional entities or as the main constituent.…”

A New Insight into the Mechanism of 1,3‐Dienes Cationic Polymerization I: Polymerization of 1,3‐Pentadiene with tBuCl/TiCl4 Initiating System: Kinetic and Mechanistic Study

“…In recent years, great attention has been paid to the investigation of the cationic polymerization of conjugated dienes such as isoprene, 1,3‐pentadiene, and even alloocimene, a naturally occurring triterpene. This interest was mainly stimulated by the recent proposition that natural rubber biosynthesis resembles a cationic step‐growth/chain‐growth reaction .…”

Polyisobutylene‐paclitaxel conjugates with pendant carboxylic acids and polystyrene chains: Towards multifunctional stent coatings with slow drug release

“…Linear block copolymers of PIB with PS or polyalloocimene have been found to exhibit thermoplastic elastomeric (TPE) properties that are conducive to their application in stent coatings. [67][68][69] The current synthetic approach offers the possibility to prepare PIB-PS graft copolymers also incorporating covalent PTX for controlled release and carboxylic acids for enhanced metal adhesion. The target PIB-PS-PTX-COOH graft copolymer was prepared by ring opening of PIB-MA with PS-OH (4000-5000 g/mol) (0.5 equiv.)…”