COMPATIBILISERS | MATERIALS
Additionally, the technology can help to avoid investment for new moulding equipment typically needed for PCR processing, making the converter operations more financially sound, effectively incorporating PCR into a portfolio. The company says that the CirKular+ product range offers promising potential to enable multi-layer film recycling and enhance performance of recycled films while reducing waste from plastic film packaging. Other success stories include a wide range of end-use applications, including industrial pallets, food and beverage packaging, circular fabrics and clothes. There continues to be more interest than ever in
EPRW Issue 5+6 已转曲.pdf 1 2023/4/10 9:57:48
compatibilisation technology for recycled plastics, agrees Salvatore Monte, President of Kenrich Petrochemicals. “However, there is a great deal of education that still needs to be done on the STEM [Science, Technology, Engineering and Mathemat- ics] aspects of recycling,” he says. “This is because a basic knowledge and understanding of polymer chemistry and filler interfacial issues is not preva- lent in either the public or private sectors. In addition, the economic and performance proper- ties of recycled compositions are still not competi-
tive with compositions made of virgin materials, so political and social mandates are necessary.” Kenrich Petrochemicals has developed ad- vanced solutions in mechanical recycling with 1.5-nanometre titanate catalysts/coupling agents. “We have looked at how polymers are made and compounded and can now provide solutions that will reduce cleaning and sorting and allow the mixing of all polymers and fillers in a melt com- pounder and make a better product, faster,” says Monte. “The extruder becomes a reactor for coupling and catalysis of all the materials in the recycle fed into the hopper. Consider that Ziegler, Natta and Kaminisky used titanium and aluminium catalysts to produce addition polymers, and titanate catalysts are used to produce condensa- tion polymers, while heteroatom titanate coupling agents compatibilise fillers with polymers. So why not use titanate and aluminium as catalysts and coupling agents for compatibilising fillers and polymers – both addition and condensation – used in plastics to be recycled?” According to Monte, current plastic recycling and sustainability goals are limited by the intrinsic incompatibility of many polymers and the negative
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