This paper presents the synthesis and characterization of stimuli-responsive polyolefins, specifically focusing on spiropyran (SP)-based comonomers copolymerized with ethylene or ethylene/cyclic monomers. The introduction of SP groups allows these polymers to respond to light, heat, and force, exhibiting color changes and mechanical motion. The functionalized polyolefins demonstrate excellent mechanical and surface properties, making them suitable for applications such as shape-memory materials, optical switches, and sensors. The study also explores the scalable production of these materials through reactive extrusion, using commercial polyolefin materials. Key findings include the successful tuning of multiple stimuli responses, the development of shape memory properties under light stimulation at room temperature, and the application of post-polymerization functionalization to commercial polymers. The research highlights the potential of these stimuli-responsive polyolefins in various technological and industrial applications.This paper presents the synthesis and characterization of stimuli-responsive polyolefins, specifically focusing on spiropyran (SP)-based comonomers copolymerized with ethylene or ethylene/cyclic monomers. The introduction of SP groups allows these polymers to respond to light, heat, and force, exhibiting color changes and mechanical motion. The functionalized polyolefins demonstrate excellent mechanical and surface properties, making them suitable for applications such as shape-memory materials, optical switches, and sensors. The study also explores the scalable production of these materials through reactive extrusion, using commercial polyolefin materials. Key findings include the successful tuning of multiple stimuli responses, the development of shape memory properties under light stimulation at room temperature, and the application of post-polymerization functionalization to commercial polymers. The research highlights the potential of these stimuli-responsive polyolefins in various technological and industrial applications.