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4 articles in Polymer & Plastics Processing
Polymer & Plastics Processing
Antioxidants — Primary, Secondary and Why You Need Both
Polymer degradation during processing is a radical chain reaction, and it takes two different molecules to stop it. A primary antioxidant — usually a hindered phenolic — donates hydrogen to terminate radicals and protects the polymer in service over long…
ReadCompatibilizers — Making Incompatible Polymers and Fillers Work Together
Most polymer pairs are immiscible: blended without help, they form coarse domains with no adhesion across the interface, and the compound fails at the domain boundary under impact. A compatibilizer is a molecule with affinity for both phases — most…
ReadLubricants and Processing Aids — Internal, External and Fluoropolymer
Internal and external lubricants solve opposite problems and are routinely confused. An internal lubricant is compatible with the polymer, lowers melt viscosity and internal friction, and reduces torque and frictional heat — it changes how the melt flows.…
ReadPurging Compound Selection — Mechanical, Chemical and Abrasive Grades
Choose the purge by the contamination you are removing, not by the machine. Mechanical purges rely on high viscosity and shear to push melt out — they are the safest choice for routine colour changes on injection moulding and are the only sensible option…
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