Influence of Partial Disentanglement of Macromolecules on the Rheological, Thermal, and Mechanical Properties of Polypropylene–Polyethylene Blends DOI Creative Commons
Justyna Krajenta, Magdalena Lipińska, Andrzej Pawlak

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(8), P. 1786 - 1786

Published: April 16, 2025

The properties of compatibilized blends polyethylene (PE) and polypropylene (PP), having reduced macromolecular entanglements, were studied. density PP entanglements was controlled by prior disentangling in solution. polymer ratio the blend 4:1 or 1:4. An ethylene–octene copolymer used as a compatibilizer. melt blending process resulted good dispersion minority component, with slightly larger inclusions when more disentangled used. Rheological studies confirmed achievement different entanglement densities macromolecules blends. partial disentanglement did not affect thermal stability During isothermal crystallization studies, faster growth spherulites observed which also influenced entire process. recovery time equilibrium investigated it turned out to be 45 min if annealed at 190 °C, shorter than analogous homopolymer. Studies tensile showed that majority share polyethylene, elongation break increased due better bonding components thus reduction microcavitation.

Language: Английский

Catalytic chemical recycling and upcycling of polyolefin plastics DOI Creative Commons

Yingzi Tan,

Yidan Cheng, Jiaming Xu

et al.

Giant, Journal Year: 2024, Volume and Issue: 19, P. 100307 - 100307

Published: June 14, 2024

Polyolefins are the most produced and widely used polymeric materials. However, chemically inert nature of polyolefins has led to severe environmental pollution, posing a threat human sustenance development. Managing recycling polyolefin plastic waste is crucial for transition from linear sustainable circular economy. Catalytic chemical includes traditional techniques like pyrolysis photolysis, innovative methods that introduce cleavable bonds into chain closed-loop recycling. post-functionalization post-consumer materials another strategy tackle waste, aiming upgrade materials' utility contribute sustainability. Overall, developing catalytic deconstructing upcycling plastics essential encourage better reclamation practices reduce impact waste.

Language: Английский

Citations

9
Crystallization Kinetics of Crystalline–Crystalline and Crystalline–Amorphous Block Copolymers of Linear Polyethylene and Isotactic Polypropylene DOI
Alessandra Cicolella, Miriam Scoti, Giovanni Talarico

et al.

Macromolecules, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Language: Английский

Citations

4
Synthesis of Graft‐Modified Polyolefin Compatibilizers for Compatibilizing Mixed Plastics DOI
Yu Chen, Yuxin Ding, Pei Li

et al.

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 11, 2025

Comprehensive Summary Recycling polyolefin and other plastic mixtures encounters significant obstacles due to the intricate nature economic inefficiencies of physically separating vast streams mixed waste. Incorporating compatibilizers emerges as a viable strategy diminish interfacial energy bolster compatibility, ultimately yielding homogeneous products. In this contribution, polar polyolefins featuring metal dynamic cross‐linking networks were synthesized by tandem polymerizing ionic cluster type monomers olefins. Subsequent treatment with HCl aqueous solution esterification polyester precursors yields high‐performance grafted for polymer compatibilizing. For PP/PC melting blends, adding 5 wt% graft‐modified results in tougher blends that surpass performance corresponding virgin iPP elongation at break (εb). Polar containing sodium carboxylate groups play dual role compatibilizing PET/HDPE acting both nucleating agents. Moreover, enables production comprising ternary polymers, which can be employed blends.

Language: Английский

Citations

0
Influence of Partial Disentanglement of Macromolecules on the Rheological, Thermal, and Mechanical Properties of Polypropylene–Polyethylene Blends DOI Creative Commons
Justyna Krajenta, Magdalena Lipińska, Andrzej Pawlak

et al.

Molecules, Journal Year: 2025, Volume and Issue: 30(8), P. 1786 - 1786

Published: April 16, 2025

The properties of compatibilized blends polyethylene (PE) and polypropylene (PP), having reduced macromolecular entanglements, were studied. density PP entanglements was controlled by prior disentangling in solution. polymer ratio the blend 4:1 or 1:4. An ethylene–octene copolymer used as a compatibilizer. melt blending process resulted good dispersion minority component, with slightly larger inclusions when more disentangled used. Rheological studies confirmed achievement different entanglement densities macromolecules blends. partial disentanglement did not affect thermal stability During isothermal crystallization studies, faster growth spherulites observed which also influenced entire process. recovery time equilibrium investigated it turned out to be 45 min if annealed at 190 °C, shorter than analogous homopolymer. Studies tensile showed that majority share polyethylene, elongation break increased due better bonding components thus reduction microcavitation.

Language: Английский

Citations

0