Structure–rheology relationships of long-chain branched polypropylene: Comparative analysis of acrylic and allylic coagent chemistry

Relationship between molecular structure, crystallization behavior, and mechanical properties of long chain branching polypropylene

“…Polypropylene (PP) foams, especially blown with supercritical carbon dioxide, have been considered one of the most promising substitutes to replacing other thermoplastics foams (e.g., polyethylene and polystyrene foams) in packaging industries because with excellent foamability can be achieved by introducing long chain branching (LCB) architecture onto the PP backbone through several approaches such as in situ polymerization in a reactor [3][4][5], high-energy irradiation [6][7][8], and melt-free radical grafting [9][10][11][12][13][14][15][16]. Among these approaches, melt-free radical grafting has gained considerable interest due to its low cost and accessibility to industrialization.…”

Effect of phosphorous-containing modified poly(vinyl alcohol) on the mechanical and flame retardant properties of polypropylene

“…These findings suggest that the polymeric additives could interact with the polypropylene phase, forming physical or chemical associates having a slightly larger hydrodynamic volume than that of plain MPP, which were not separated during the elution run. This could also explain the increase in M w observed for B17, in which the bulky pendant substituent can modify the size of the dissolved polymer adduct, thus yielding increased values of molecular weight [23].…”

Preparation and rheology characterization of branched polypropylene during reactive extrusion process

“…Preparation of LCB-PP occurs through several reactions [10,11]. The first step involves the thermal decomposition of peroxide to form primary radicals.…”