Table 2. Summary of Different Shape Changing Stimuli-Responsive Commodity Polymer Composites and Bilayers.

commodity polymer	shape changing composite, bilayer or multilayer	active layer	stimulus	refs
PA6	bilayer	conductive paint, graphene	light, thermal	(11)
PA6	bilayer	LCN	humidity	(22)
PA6	bilayer	hydrogel	humidity	(60)
PA6	bilayer	PA6	humidity	(61)
PA6	bilayer	PA6	humidity, thermal	(63)
PA6	n/a	PA6	thermal	(64)
PET	bilayer	azobenzene	light	(67)
PET	bilayer	CNF	humidity, thermal	(68)
PET	bilayer	Ag-plated	(electro)thermal	(69)
PE	n/a	PE	thermal	(64)
PE	composite	azobenzene	light, thermal	(71, 72)
PE	bilayer	azobenzene	light, thermal	(73)
PE	bilayer	hydrogel, CNT	humidity, light, thermal	(74)
PE	multilayer	azobenzene	light, thermal	(75−77)
PE	bilayer	azobenzene	light, thermal	(78, 79)
PP	composite	LCN	humidity	(83)
PP	bilayer	hydrogel	humidity, light, thermal	(84)
PP	bilayer	azobenzene	light, thermal	(86)