Plasticisers & Hardeners

The lesson explores the roles of plasticizers and hardeners in modifying polymer properties. Plasticizers make polymers like PVC softer and more flexible by reducing intermolecular forces, while hardeners or crosslinking agents increase rigidity and strength. The video discusses the applications and safety concerns of these additives, such as the potential carcinogenic nature of some plasticizers and the environmental impact of vulcanized rubber. Examples include the use of plasticized PVC in raincoats and UPVC in window frames, and the vulcanization of rubber for tires.

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