Poly(<scp>l</scp>-lactic acid)-block-poly(butylene succinate-co-butylene adipate) Multiblock Copolymers: From Synthesis to Thermo-Mechanical Properties

Zeng, Xiaoqing; Wu, Binshuang; Wu, Linbo; Hu, Jijiang; Bu, Zhiyang; Li, Bo‐Geng

doi:10.1021/ie403623f

Cited by 34 publications

(29 citation statements)

References 30 publications

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“…With increasing the composition of HDA in PLH copolymers, the elongation at break increased significantly. When nLA/nHDA was 5.0/1, the elongation reached 640%, which was higher than the other reported copolymers, such as the elongation at break of the modified PLLA by TFC being 12.9% [20], penta-block copolymers (penta-sb-PLA) being 470% [34], poly(L-lactic acid) and poly(butylene carbonate) (PLA-b-PBC) being 430% [35] and poly(L-lactic acid)-block-poly(butylene succinate-co-butylene adipate) (PLLA-b-P(BS-co-BA) being 503% [36]. This result suggested that the PLH copolymers had high ductility.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Synthesis of Bio-Based Poly(lactic acid-co-10-hydroxy decanoate) Copolymers with High Thermal Stability and Ductility

et al. 2015

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Novel bio-based aliphatic copolyesters, poly(lactic acid-co-10-hydroxy decanoate) (P(LA-co-HDA), PLH), were successfully synthesized from lactic acid (LA) and 10-hydroxycapric acid (HDA) by a thermal polycondensation process, in the presence of p-toluenesulfonic acid (p-TSA) and SnCl2·2H2O as co-catalyst. The copolymer structure was characterized by Fourier transform infrared (FTIR) and proton nuclear magnetic resonance ( 1 H NMR). The weight average molecular weights (Mw) of PLH, from gel permeation chromatography (GPC) measurements, were controlled from 18,500 to 37,900 by changing the molar ratios of LA and HDA. Thermogravimetric analysis (TGA) results showed that PLH had excellent thermal stability, and the decomposition temperature at the maximum rate was above 280 °C. The glass transition temperature (Tg) and melting temperature (Tm) of PLH decreased continuously with increasing the HDA composition by differential scanning calorimetry (DSC) measurements. PLH showed high ductility, and the breaking elongation increased significantly by the increment of the HDA composition. Moreover, the PLH copolymer could degrade in buffer solution. The cell adhesion results showed that PLH had good biocompatibility with NIH/3T3 cells. The bio-based PLH copolymers have potential applications as thermoplastics, elastomers or impact modifiers in the biomedical, industrial and agricultural fields. OPEN ACCESS Polymers 2015, 7 469

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Section: Mechanical Propertiesmentioning

confidence: 99%

Synthesis of Bio-Based Poly(lactic acid-co-10-hydroxy decanoate) Copolymers with High Thermal Stability and Ductility

et al. 2015

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“…Many approaches have been carried out to improve the toughness of PLLA including copolymerization, plasticization and physical blending. However, the synthesis of copolymers is usually complex and high cost.…”

Section: Introductionmentioning

confidence: 99%

Super‐toughened poly(l‐lactic acid) fabricated via reactive blending and interfacial compatibilization

Zheng

Chen

et al. 2016

Polymer International

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Super‐toughened poly(l‐lactic acid) (PLLA) was prepared by reactive blending of PLLA with poly(ϵ‐caprolactone) (PCL), glycerol and 4,4′‐methylenediphenyl diisocyanate. The reactive interfacial compatibility between PLLA and the formed crosslinked polyurethane (CPU) in the PLLA matrix was studied in detail. The morphology and the toughness of the blends can be tuned by changing the CPU content. The results indicate that the impact strength of PLLA shows a tendency to higher values with the increasing PCL content up to 20 wt%. The notched impact strength of the blend with 20 wt% PCL increases to 55.01 kJ m−2, which is 24.9 times higher than that of neat PLLA. The elongation at break is also increased from 5% to 139.4%, indicating the brittle − ductile transition. The increased interfacial binding strength through the reactive interfacial compatibility and the formation of a CPU network in the PLLA matrix account for the improved toughness of PLLA/CPU blends. Dynamic mechanical analysis results indicate that the compatibility between PLLA and CPU is improved with increasing CPU content resulting in the formation of more interfacial phase. In addition, rheological property measurements indicate that the improvement in storage modulus and complex viscosity is ascribed to the formation of a CPU network in the PLLA matrix. © 2016 Society of Chemical Industry

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“…P(LLA‐mb‐BSA) multi‐block copolymers were synthesized via chain extension and coupling of poly(L‐lactic acid) (PLLA) and poly(butylene succinate ‐co‐ adipate) (PBSA, BA unit 60 mol %) prepolymers using 1,4‐PBO and HDI as chain extenders, as previously reported . The PLLA and PBSA prepolymers were synthesized via direct polycondensation and their hydroxyl values and number‐average molecular weights ( M n , determined by 1 H NMR) were 6.84 and 44.0 mg KOH/g, 8200 and 3100 g/mol, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Biodegradable polyurethane thermoplastic elastomers (TPUs) are also excellent impact modifiers for PLLA due to the flexible chain nature and the formation of hydrogen bonding between TPU and PLLA . In addition, block or multi‐block copolymers including PLLA hard segment and various soft segments including poly(ɛ‐caprolactone ‐co‐ δ‐valerolactone), poly( ɛ ‐decalactone), poly(ɛ‐caprolactone), and poly(butylene succinate ‐co‐ adipate) exhibit good to excellent composition‐depending toughness and/or elasticity.…”

Section: Introductionmentioning

confidence: 99%

“…In a previous study, we put forward a polycondensation and chain extension/coupling method to synthesize P(LLA‐mb‐BSA) multi‐block copolymers with tunable thermo‐mechanical properties ranging from toughened PLLA to thermoplastic elastomers. In this study, NA‐containing P(LLA‐mb‐BSA) multi‐block copolymers were synthesized from NA‐containing PLLA and PBSA prepolymers with higher molecular weights.…”

Section: Introductionmentioning

confidence: 99%

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Nucleating agent‐containing P(LLA‐mb‐BSA) multi‐block copolymers with balanced mechanical properties

Zeng

et al. 2017

J of Applied Polymer Sci

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In order to obtain high performance bioplastics and thermoplastic elastomers, P(LLA-mb-BSA) multi-block copolymers containing 30 wt % and 70 wt % soft segment (PLBSA30 and PLBSA70 for short) were synthesized via chain extension and coupling of poly(L-lactic acid) (PLLA) and poly(butylene succinate-co-adipate) (PBSA) prepolymers in the presence of 1% nucleating agent (NA). They were characterized with proton nuclear magnetic resonance ( 1 H NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), polarizing optical microscopy (POM), thermal gravimetric analysis (TGA), transmission electron microscope (TEM), and tensile and impact test. The relatively high molecular weights of (M n 8200 g/mol and 3100 g/mol for PLLA and PBSA, respectively) the polyester sequences are helpful to improve the PLLA crystallization and the flexibility of the PBSA soft segment. Nucleation effect further accelerates the crystallization of PLLA segment. The synergistic effect of these factors results in good balance between stiffness and toughness. PLBSA30s containing 1% zinc citrate (ZnCC) or talc behave as ultra-tough bioplastics with ultrahigh impact strength over 50 kJ/m 2 and excellent tensile properties. PLBSA70 containing 1% ZnCC possesses elongation at break of 600% and retains high modulus (56 MPa) and strength (16 MPa) and therefore behaves as an excellent thermoplastic elastomer. The excellent and balanced properties would extend the end applications of these PLLA-based materials.

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Poly(l-lactic acid)-block-poly(butylene succinate-co-butylene adipate) Multiblock Copolymers: From Synthesis to Thermo-Mechanical Properties

Cited by 34 publications

References 30 publications

Synthesis of Bio-Based Poly(lactic acid-co-10-hydroxy decanoate) Copolymers with High Thermal Stability and Ductility

Synthesis of Bio-Based Poly(lactic acid-co-10-hydroxy decanoate) Copolymers with High Thermal Stability and Ductility

Super‐toughened poly(l‐lactic acid) fabricated via reactive blending and interfacial compatibilization

Nucleating agent‐containing P(LLA‐mb‐BSA) multi‐block copolymers with balanced mechanical properties

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