Novel Biodegradable Polylactide/Poly(butylene succinate) Composites via Cross-Linking with Methylene Diphenyl Diisocyanate

Abstract

A novel polylactide/poly(butylene succinate) composite via cross-linking with methylene diphenyl diisocyanate was used. The methylene diphenyl diisocyanate (MDI) was to couple with end hydroxyl of polylactide and poly(butylene succinate) by a torque rheometer and the samples were compression molded into plate successfully. A series of composites was studied with various amounts of poly(butylene succinate) (PBS) from 0 to 40 wt%. Tensile test results demonstrated that the elongation at break of the MDI-based PLA/PBS composites increased greatly compared with PLA/PBS, PLA and PBS. Fourier transform infrared spectroscopy (FTIR) tests indicated the MDI-based composite showed a new urethane bond among different components. Melting Flow Rate (MFR) in PLA/PBS composites decreased with increasing PBS content.

Polylactide (PLA) and Its Blends with Poly(butylene succinate) (PBS): A Brief Review

“…They must be distributed at a high rate in the polymer melt during blending [28]. A large number of reactive compatibilizers for PLA/PBS blends have been reported, for example diphenyl diisocyanate (MDI) [46], lysine triisocyanate (LTI) [42], lysine diisocyanate (LDI) [42], glycidyl methacrylate (GMA) [47], dicumyl peroxide (DCP) [16,44,48], benzoyl peroxide (BPO) [43], organoclays and epoxy functionality-containing components [49], epoxy functionality-containing components (Joncryl TM ) [24].…”

Facile Preparation and Characterization of Short-Fiber and Talc Reinforced Poly(Lactic Acid) Hybrid Composite with In Situ Reactive Compatibilizers

“…Based on these aspects, in situ reactive processing can be introduced and applied for hybrid composite processing, allowing the possibility of increasing the interfacial adhesion with a cost-effectiveness in terms of the manufacturing technique [ 10 ]. Some of the current in situ compatibilizers used for each biopolymer blends have been investigated, such as Methylene diphenyl diisocyanate (MDI) used in Poly(lactic acid)/Polybutylene succinate [ 18 ] and Poly( l -lactic acid)/Polycaprolactone [ 19 ], Dicumyl peroxide (DCP) used in Poly( l -lactic acid)/Polybutylene succinate [ 20 ] and PHB/Polybutylene succinate [ 21 ], Joncryl used in Poly(lactic acid)/PBSA [ 22 ], Poly(lactic acid)/Polypropylene carbonate [ 23 ] and Poly( l -lactic acid)/PBAT [ 24 ], PLA-g-GMA (glycidyl methacrylate grafted Poly(lactic acid) used in PLA/Starch [ 25 ], PLA-g-MA (Maleic anhydride-grafted Poly(lactic acid)) used in Poly(lactic acid)/Polycaprolactone [ 26 ], Poly(lactic acid)/Starch [ 27 ] and Poly( l -lactic acid)/Polybutylene adipate terephthalate [ 28 ]. From our previous work, different types of reactive agents including multifunctional epoxide-based reactive terpolymer (CEGMA, EAGMA) and maleic anhydride-based reactive terpolymer (EAMAH) were introduced as in situ reactive compatibilizer in the processing of PLA biocomposites [ 10 ].…”

Binary Mixed Homopolymer Brushes Tethered to Cellulose Nanocrystals: A Step Towards Compatibilized Polyester Blends

“…10 Another possibility to improve the mechanical properties of PLA is polymer blending with the poly(butylene succinate) (PBS) -another bio-based polyester displaying higher flexibility. [13][14][15][16][17][18] Initially, PLA and PBS were reported to be miscible in the amorphous regions, 13 but further studies concluded that phase-separation occurs if the PBS content exceeds 20 wt%. 14 Therefore, multiple efforts have been undertaken on the compatibilization of the two polyesters via reactive blending.…”

“…14 Therefore, multiple efforts have been undertaken on the compatibilization of the two polyesters via reactive blending. [15][16][17] However, physical blending in presence of an interfacial compatibilizer still represents a more convenient, lower cost and compositioncontrolled method. 18 This blending often uses carefully engineered block or graft copolymers; 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 4 although another category of interfacial agents has been approached, i.e.…”