THERMOPLASTIC STARCH
AND BIODEGRADABLE
POLYMER BLENDS
,Topic overview
Theme Core question
Raw material How does starch structure influence its processing?
Thermoplasticization How do heat, shear, and plasticizers transform starch?
Blends How can TPS be combined with biodegradable polyesters?
Performance How do morphology, interface, and composition control properties?
End of life Under what conditions does effective biodegradation occur?
,Why use starch?
Starch is abundant, renewable, and widely
available through agro-industrial supply chains. Its
high density of hydroxyl groups promotes
intermolecular interactions and also explains its
strong affinity for water. Its technological appeal lies
in the possibility of converting a granular
polysaccharide that is not inherently thermoplastic
into a melt-processable material. This conversion
can reduce reliance on petrochemical polymers and
enable biodegradable materials with potentially
competitive costs, provided that moisture sensitivity,
brittleness, and stability are properly controlled.
Renewable starch sources and their conversion into feedstock for
thermoplastic materials.
, Major starch sources
Source General characteristics Technological implication
Corn widely available; varying amylose versatile for formulation studies
contents
Cassava relatively large granules and good facilitates film and TPS formation
purity
Potato large granules and naturally strong hydration and distinctive rheological
occurring phosphate groups behavior
Wheat associated with proteins and other may require tighter composition control
components
Rice small granules favors fine dispersions in some processing
routes
AND BIODEGRADABLE
POLYMER BLENDS
,Topic overview
Theme Core question
Raw material How does starch structure influence its processing?
Thermoplasticization How do heat, shear, and plasticizers transform starch?
Blends How can TPS be combined with biodegradable polyesters?
Performance How do morphology, interface, and composition control properties?
End of life Under what conditions does effective biodegradation occur?
,Why use starch?
Starch is abundant, renewable, and widely
available through agro-industrial supply chains. Its
high density of hydroxyl groups promotes
intermolecular interactions and also explains its
strong affinity for water. Its technological appeal lies
in the possibility of converting a granular
polysaccharide that is not inherently thermoplastic
into a melt-processable material. This conversion
can reduce reliance on petrochemical polymers and
enable biodegradable materials with potentially
competitive costs, provided that moisture sensitivity,
brittleness, and stability are properly controlled.
Renewable starch sources and their conversion into feedstock for
thermoplastic materials.
, Major starch sources
Source General characteristics Technological implication
Corn widely available; varying amylose versatile for formulation studies
contents
Cassava relatively large granules and good facilitates film and TPS formation
purity
Potato large granules and naturally strong hydration and distinctive rheological
occurring phosphate groups behavior
Wheat associated with proteins and other may require tighter composition control
components
Rice small granules favors fine dispersions in some processing
routes
