In-situ photocrosslinkable nanohybrid elastomer based on polybutadiene/polyhedral oligomeric silsesquioxane

Abstract

Hydroxyl functionalized nano-sized POSS or ethyleneglycol as diol monomers was incorporated to hydroxyl-terminated polybutadiene (HTPBD) chain in the presence of fumaryl chloride as extender. Blue light photocrosslinking system based on camphorquinone (photoinitiator) and dimethylaminoethyl methacrylate (accelerator) was applied to cure these two synthesized fumarate based macromers. Self-crosslinkability of unsaturated macromers and also crosslinking in presence of a reactive diluent were investigated in absence and presence of 1,4-butanediol dimethacrylate, respectively. Finally, photocured samples were characterized by XRD, SEM, equilibrium swelling study, TGA, DMTA, AFM and cell culture. The results showed that incorporation of POSS nanoparticle into the polymer matrix with a perfect distribution and dispersion can enhance thermal stability, mechanical and biocompatibility properties which can prove a good potential of this in-situ photocrosslinkable nanohybrid in medical applications.

New high impact polystyrene: Use of poly(1‐hexene) and poly(1‐hexene‐co‐hexadiene) as impact modifiers

“…A sol fraction extraction study was performed on the reactive blended specimens using a procedure at references . At least 3 rectangular specimens for each composition were accurately weighed (W 1 ) and placed into 50 mL of toluene under gentle shacking at room temperature to swell and extract the unreacted PS and rubbers.…”

“…A sol fraction extraction study was performed on the reactive blended specimens using a procedure at references. 1,25,26 At least 3 rectangular…”

“…Polymer blending is one of the cheapest methods of tailoring polymeric materials for specific applications. The gain in new properties depends on the degree of compatibility or miscibility of the polymers in the intermolecular level …”

Polyethylene glycol/polyhedral oligomeric silsesquioxane as an in situ photocrosslinkable polymeric nanohybrid

“…It was found that the inherent strength and rigidity of the inorganic POSS siliceous nucleus as well as the springiness of organic side substituents (R) can improve the overall performance of POSS/polymer nanohybrid matrices. In these nanohybrid materials, well‐dispersed POSS nanoparticles can enhance the morphological, mechanical, thermal, oxidative and biostability properties of hybrid polymers under critical situations …”

Preparation and properties of enhanced nanocomposites based on PLA/PC blends reinforced with silica nanoparticles

“…Other reactive compatibilizers used in PLA blends, promote exchange reactions between PLA's end functional groups (ie, hydroxyl or carboxyl) and the complementary groups in the compatibilizer. [7][8][9][10][11][12][13] In this research, reactive modification of PLA by PC and nanosilica particles is targeted. To this end, two different kinds of catalysts, dicumyl peroxide (DCP, a radical initiator) and Cobalt(II) acetylacetonate (a coordination catalyst), were employed to assist chemical grafting and transesterification reactions, respectively.…”