Zer. Reas rHDPE/rPET blends and rPET/LLDPE blends [328,333]. Usually, a compatibilizer searchers have Lactacystin Description studied the impact of has been located to have a adverse impact perfordosage above 50 inside the blendvarying compatibilizer dosage on material on the mance, for example rHDPE/rPET blends and rPET/LLDPE blends [328,333]. Generally, a commechanical properties on account of the formation of agglomerates and voids. compatibilizers in higher dosages may also reduce the crystallinity with the polymers byto have a adverse impact patibilizer dosage above 50 within the blend has been found growing the adhesion amongst them [328,333].Energies 2021, 14, x FOR PEER REVIEW26 ofEnergies 2021, 14,26 of 43 around the mechanical properties due to the formation of agglomerates and voids. Compatibilizers in high dosages can also lower the crystallinity on the polymers by increasing the adhesion in between them [328,333].Figure 18. Chemical reactions involving rPET and GMA function. (a) Chain extension with OH finish group and crosslinking Figure 18. Chemical reactions in between rPET and GMA function. (a) Chain extension with OH end group and crosslinking (b) chain extension with COOH group and crosslinking. Reproduced under beneath with the CC-BY CC-BY license with (b) chain extension with COOH finish finish group and crosslinking. Reproduced terms terms of your license with permission [335]. permission [335].Much less generic compatibilizers for the use inin rPET and rPO blends have also been studLess generic compatibilizers for the use rPET and rPO blends have also been studied. Choudhury et al. et al. [337] evaluated the efficiency of an ionomeric compatibilizer, Surlyn ied. Choudhury [337] evaluated the efficiency of an ionomeric compatibilizer, Surlyn 1650, which which can be salt of your ethylene-methacrylic acid copolymer. The carboxylate function 1650, is a zinc a zinc salt with the ethylene-methacrylic acid copolymer. The carboxylate of this compatibilizer can react with all the carbonyl and hydroxyl groups of rPET. rPET. function of this compatibilizer can react together with the carbonyl and hydroxyl groups of This studystudy underlined an enhanced compatibilization rLLDPE/rLDPE/rPET compared This underlined an enhanced compatibilization with the of the rLLDPE/rLDPE/rPET comto the a single observed with PE-g-MA. The effecteffect of gamma irradiation was examined pared to the 1 observed with PE-g-MA. The of gamma irradiation was examined by Abdel Tawab et al. [338]. ThisThis remedy showed antagonist effects: the enhancement by Abdel Tawab et al. [338]. remedy showed two two antagonist effects: the enhanceof crosslinking, which which improved the adhesion of polymers, but in addition an oxidative ment of crosslinking, enhanced the adhesion of polymers, but in addition an oxidative chain scission. By coupling a gamma irradiation dose of 100 of one hundred kGy and 10amount of EVA, chain scission. By coupling a gamma irradiation dose kGy and ten wt wt level of Abdel Abdel Tawab et al. [338] made awith improved mechanical properties. EVA, Tawab et al. [338] created a blend blend with enhanced mechanical properties. 5.4. Production of Composites from rPET and/or rPO 5.four. Production of Composites from rPET and/or rPO As described in Section five.3, rPET and rPO is usually combined to make blends, but As described in Section five.3, rPET and rPO can be combined to create blends, but they can also be employed to create composites. Each rPET and rPO is usually employed as they will also be employed to create composites. Each rPET and rPO can be.