Overview / Routes / PLA, lactide copolymers & blends
Polylactide from fermentation-derived lactic acid, including stereocomplex PLA and PLA blends.
Scope: L/D-lactide, stereocomplex PLA (scPLA), PLA/PBAT, PLA/PHA and PLA/PBS blends, nucleation, heat resistance and impact modification.
Polylactide (PLA) is an aliphatic polyester made from lactic acid. Auras et al. describe it as derived from renewable resources and biodegradable, and review it as a packaging material.
PLA is also being developed for durable products. Nagarajan et al. describe the main obstacle as PLA's high strength but low toughness, together with limited heat resistance.
Lactic acid is chiral, so PLA can be built from L- and D-lactyl units. Blending poly(L-lactide) and poly(D-lactide) gives a stereocomplex; Tsuji reports that stereocomplexation improves mechanical properties, heat resistance and hydrolysis resistance.
High-molar-mass PLA is usually made by ring-opening polymerisation (ROP) of lactide, the cyclic dimer of lactic acid (see Chemistry).
Fermentation product and parent hydroxy acid of PLA; the (S)-enantiomer.
C[C@H](O)C(=O)OCyclic dimer of L-lactic acid; ring-opening polymerisation of lactide gives high-molar-mass PLA.
C[C@H]1C(=O)O[C@H](C(=O)O1)CRepeat unit of PLLA. Hydrolysis returns L-lactic acid, which fixes the stereocentre as (S).
*O[C@@H](C)C(*)=Overified via lactic-acid · source
Classic catalyst for lactide ROP; forms the active tin alkoxide with an alcohol co-initiator.
CCCCC(CC)C(=O)[O-].CCCCC(CC)C(=O)[O-].[Sn+2]Drawn from SMILES with RDKit and verified against PubChem. Full structure library →
Fermentation gives lactic acid, which is converted to lactide and polymerised by ROP. Tin(II) 2-ethylhexanoate (Sn(Oct)₂) is the classic catalyst; Kowalski et al. show that polymerisation proceeds by monomer insertion into a tin–alkoxide bond formed with an alcohol co-initiator.
Jiang et al. report neat PLA as strong and stiff but brittle, and blend it with flexible PBAT to raise elongation and toughness at the cost of strength and modulus.
Auras et al. report lower melting and glass transition temperatures for PLA than for PET and PS, and gas permeability lower than PS but higher than PET.
Sourced property table (ND where no value is quoted) →
Each attribute is recorded separately and never inferred from another.
None listed. Organisations are named here only when a checked development or cited source names them.
Cross-cutting: Heat resistance & HDT · Brittleness, impact & ageing · Processing window & crystallisation speed · Moisture & hydrolytic stability · End of life & recyclability streams
By being truly biodegradable, derived from renewable resources[Auras 2004]
PLA also has lower melting and glass transition temperatures than PET and PS.[Auras 2004]
Stereocomplexation enhances the mechanical properties, the thermal‐resistance, and the hydrolysis‐resistance of PLA‐based materials.[Tsuji 2005]
polymerization proceeds by simple monomer insertion into the[Kowalski 2000]
a biobased and biodegradable polymer as polylactic acid (PLA) with its high strength but low toughness[Nagarajan 2016]
elongation and toughness were dramatically increased[Jiang 2006]
poly(lactic acid) is basically non‐degradable in seawater[Haider 2019]
in the natural environment, PLA has a slow biodegradation rate[McKeown 2020]
Each quote is re-checked against the published abstract in CI.
No checked developments.
“NatureWorks Opens 75,000-Ton PLA Facility in Thailand” (title)
“The PLA20 blend achieves an optimal balance of properties, combining improved notched impact strength with elongation at break of 225.7%” (abstract)
“the synthesis of APTPE stars containing stereodefective poly(lactide) end diblocks” (abstract)
“Balrampur Chini to set up India's first large-scale sugarcane-based biopolymer plant in Uttar Pradesh” (title)
“Blends of the purified PHBV with poly(lactic acid) (PLA) were reactive melt-processed with triallyl isocyanurate” (abstract)
“selective alcoholysis of PLA promoted by a commercial titanium alkoxide” (abstract)
“Energy Absorption of PLA/PBAT and PLA/PBS Biodegradable Polymer Blends” (title)
“ESO-assisted interfacial regulation of PLA containing a bio-based P/N flame retardant” (title)
“increasing elongation at break from 4.9% for neat PLA to values above 220% for all plasticized systems” (abstract)
“sequence-controlled poly(lactide-carbonate) copolymers via ring-opening copolymerization (ROCOP)” (abstract)
“These results suggest that PMLA and PLLA are largely immiscible.” (abstract)
“coarse-grained molecular dynamics simulations were employed to investigate PLA/ENR blends with different ENR chain lengths and dual crosslinking networks” (abstract)
“Effects of composting conditions on rigid PLA/PBAT composite degradation” (title)
“This study investigated how pyrolysis temperature and walnut-shell biochar content affect the structural, thermal and biodegradation behaviour of polylactic acid (PLA) films.” (abstract)
“the influence of nanoparticle size on degradation pathways has not been systematically investigated” (abstract)
“These results demonstrate the potential of thermoplasticized bamboo flour as a deformable biomass modifier for toughening PLA.” (abstract)
“three ternary hybrids containing a constant 10 wt.% total reinforcement at Mg:nHA ratios of 1:1, 3:1, and 1:3” (abstract)
“3D打印需求拉动聚乳酸价格走高，海正生材净利增超5倍、联泓新科翻倍” (title)
“日精樹脂工業、PLAに木粉配合の植物由来・生分解性バイオプラを開発・販売開始” (title)
“The catalytic application of a cyclopentadienyl-silsesquioxane titanium complex” (abstract)
“Green energy storage films derived from sustainable bio-based materials based on PLA, zein” (title)
“日精樹脂、ＰＬＡベースに開発 バイオプラ「リグノフォーム」” (title)
“biodegradable printing plates based on polylactic acid (PLA), polycaprolactone (PCL), and silicon dioxide (SiO2) nanoparticles were produced for embellishment printing applications” (abstract)
“2 wt.% multi-walled carbon nanotube (MWCNT)-reinforced polylactic acid (PLA) composite filament” (abstract)
“Effect of Polylactide Structural Parameters on its Hydrolytic Degradation” (title)
“PLA meltblowns prepared in this study had an average fiber diameter of 2.17 to 3.11 micrometers.” (abstract)
No checked developments.
“Engineering crystalline architecture in PLA/PBAT-based blend films through PDLA and talc” (title)
“Starts Production with Key Tower Internals from SuTong” (title)
“Balrampur Sugar builds India’s first sugar-based PLA plant in Lakhimpur Kheri” (title)
“The use of poly(lactic acid)/poly(butylene succinate) blends modified with natural fillers” (title)
“increasing Mater-Bi content enhanced film flexibility and elongation but reduced tensile strength and puncture resistance” (abstract)
“thermally activated reactive modification of PLA with two functional polysiloxanes of varying molecular architectures” (abstract)
“Scale-up cost analysis indicates price competitiveness with glass fiber/polypropylene panels at > 50,000 units per annum” (abstract)
“NCOA yielded a PLA blend with a remarkably higher impact toughness (131.0 kJ/m2)” (abstract)
“Balrampur Chini gets ₹75 crore BioE3 grant for PLA R&D facility” (title)
“Centre approves ₹75 cr grant for Balrampur Chini to set up bioplastic R&D unit” (title)
“Balrampur Chini gets Rs 75 cr grant from Centre to set up bioplastic R&D plant in UP” (title)
“yields hierarchically macro-/meso-porous aerogels” (abstract)
“Mechanical Toughening of Telechelic Copolymer to Poly(lactic acid) Blends” (title)
“Steric Confinement Enables Enhanced Nucleation of Poly(L-lactide) on Nanotalc” (title)
“biocomposites printed unidirectionally at a raster angle of 0° showed considerably higher impact strength” (abstract)
“ReBioCycle demonstrates PLA closed-loop chemical recycling from mixed plastic waste” (title)
“Blending with a flexible second component promotes stereocomplexation” (abstract)
“polylactide microparticles stabilized with alkylated chitosan were prepared via an oil‐in‐water emulsion solvent evaporation method” (abstract)
“Lasts 7 to 10 Years and Decomposes in the End!” (title)
“we synthesized a series of biodegradable copolymers, PLLA-PEG-PLLA and PDLA-PEG-PDLA, and prepared their stereocomplexes” (abstract)
“Highly active tetranuclear sodium Salan complexes for the ring-opening polymerization of L-lactide” (title)
“poly (butylene succinate-co-butylene terephthalate)/poly (L-lactic acid) composite films reinforced with coal gangue” (title)
“Strength-toughness balanced, high UV-shielding PBAT/PLA-based films” (title)
“direct evidence for ternary PLA/PHA/PHU systems remains scarce” (abstract)
“the influence of different catalysts on the ring-expansion polymerization (REP) of L-lactide” (abstract)
“Closed-Loop Recycling of PLA Bioplastics from Mixed Plastic Waste” (title)
“novel bio-nanocomposites based on poly(lactic acid) (PLA) that are reinforced in a combined way with cellulose nanocrystals (CNC)” (abstract)
“a high turnover frequency (TOF) of 8400 h-1 for the bulk ROP of l-lactide conducted at 180 °C in air” (abstract)
“reducing volumetric wear loss from 17.97 to 14.32 mm3 (approximately 20%)” (abstract)
“Metal-center effects of Ce-, Fe-, and Co-Salen complexes” (title)
“introducing PLA and, particularly, stereocomplex PLA in the UV-cured SPEs, led to improved electrochemical stability” (abstract)
“Micropore formation during hydrolytic degradation of PLA/IA and PLA/PIA blends” (title)
“FDM printing of natural fiber-reinforced PLA composites (NFRPCs) has emerged” (abstract)
“Adding 10 wt% short carbon fibers increased the tensile modulus from 2.33 to 3.72 GPa” (abstract)
“Fluorescence microscopy confirms TPE preferentially accumulates in the PLA phase and enriches at the PLA/PBAT interface” (abstract)
“the chemo-catalytic conversion of renewable biomass-especially non-edible lignocellulosic feedstocks-has emerged as a promising alternative” (abstract)
“称未接收聚乳酸订单” (title)
“Household Recycling Rejects Strengthen Compostable PLLA Composites” (title)
“DSC revealed WF as a potent nucleating agent, increasing PLA crystallinity from 49.50 to 73.15%” (abstract)
“the TP/GM/PLA biothermoplastic composite with 2.5% NCC produced the best characteristics” (abstract)
“39.40% plasticized poly(lactic acid)/Saqqez gum blend, 30.59% xylitol, 20.00% glycerin, and 10.00% calcium carbonate” (abstract)
“This study conducted a cradle-to-grave life cycle assessment of poly(butylene adipate-co-terephthalate)/poly(lactic acid) (PBAT/PLA; PPLA)” (abstract)
“Films produced by injection moulding (IM) and compression moulding (CM) were air-plasma-treated and dip-coated under identical conditions.” (abstract)
“Mussel-inspired copper-catechol coordination network enabled fire-retardant polylactide composites” (title)
“All complexes were tested as initiators for ring-opening polymerization (ROP) of ε-caprolactone, L-lactide, and rac-lactide” (abstract)
“Overall, MA-compatibilization improved CNCs dispersion, resulting in enhanced thermomechanical performance of biopolymers.” (abstract)
“Artikel ini mengkaji sintesis, karakterisasi, dan aplikasi PLA melalui analisis 45 publikasi ilmiah periode 2016–2026.” (abstract)
“WS up to 5-fold higher than the PLA scaffold” (abstract)
“The foam density of composites lowered 15% compared with pure PLA foam.” (abstract)
“capable of monitoring real-time PLLA degradation” (abstract)