ADDITIVES | COMPATIBILISERS


Reactor


Titanocene Polymerisation – Ethylene Monomer


Extruder


Titanate Copolymerisation – Ethylene Polymers


Figure 4: More than 5% of PP in PE typically creates delamination. Kenrich Petrochemicals says phosphato titanate can be used to regenerate mixes with much higher PP contents, in this case in 80:20 LDPE:PE Source: Salvatore Monte/Kenrich Petrochemicals


than 5% PP, blends of PE/PP-50/50 are made compatible with titanate catalyst. Since Ti and Zr are used as catalysts in the formation of addition (polyolefin) and condensation (polyester) poly- mers, the catalytic compatibilisation effect will be shown to occur in a mixture of macromolecules such as HDPE/PP/PET,” he said. “Multi-polymer compatibility obviates the need


for matching polarities such as needed with copolymer compatibilisers and depolymerisation concerns when maleated copolymers come in contact with condensation polymers such as PET and polyamide,” he added. In the abstract for a paper to be given later this


year, Monte says: “Current plastic recycling and sustainability goals are limited by the intrinsic incompatibility of many polymers and the negative effect of fillers and impurities on end-product prop- erties, thus requiring a high degree of expensive sorting, separating and cleaning. Another barrier is the melt processing of polymers causes chain scissoring resulting in recycle and regrind materials having inferior properties compared to virgin. “Current compatibilisers offered to recyclers are based on co-polymers or maleic anhydride modified polymers. Co-polymer compatibilisers require extensive sorting to match up the polarities of the recycled materials and maleic anhydride depolymerises condensation polymers such as PET and nylon, obviating their use in post-consumer recycle. MAH technology claims to be a coupling agent, which is true for rebuilding molecular weight – but, misnomered when applied to coupling filler and organic interfaces,” he says.


CLICK ON THE LINKS FOR MORE INFORMATION: � www.addivant.com � www.clariant.com � www.eastman.com � www.polyram-group.com � www.polymerasia.com � www.tisan.com.tr � www.mitsui.com/de � www.polyscope.eu � www.vertellus.com � www.thecompoundcompany.com � www.cornell.edu � https://twin-cities.umn.edu (University of Minnesota) � www.4kenrich.com


High-performance thermoplastic HFFR and cross-linkable polyolefin compounds of our TABOCAB brand


Effective tailor-made solutions for special applications in the cable industry


Cooperation with our partners in development, service, technical support and customer care


Safer Cables, Safer Living SILON Compounds Make Better Cables


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