The Effect of Chain Extender on Poly(3-hydroxybutyrate-co-3-hydroxyvalerate): Thermal Degradation, Crystallization, and Rheological Behaviours

Duangphet, Sitthi; Szegda, Damian; Song, Jim; Tarverdi, Karnik

doi:10.1007/s10924-012-0568-5

Cited by 47 publications

(52 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both profiles were very similar but a slightly lower T m and percentage crystallinity were observed after the addition of Joncryl ® . This is because chain extenders increase the molecular weight by crosslinking or branching leading to a reduction in chain mobility . The calculated crystallinity of PHB is lower than the percentage crystallinity described in literature .…”

Section: Resultsmentioning

confidence: 65%

“…Also TGA analysis showed that the degradation temperature increased by 20% (1% Joncryl ® m/m). But for poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV), a lower crystallization temperature and crystallinity was found after addition of Joncryl ® . The positive effect of the addition of nanoparticles was demonstrated by Ray , who found that the addition of montmorillonite (MMT) clay and organically modified synthetic fluorine mica to PLA increased the heat deflection temperature (HDT) with 17°C and 39°C, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heat resistance of biobased materials, evaluation and effect of processing techniques and additives

Peelman

Ragaert

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

The paper describes the effect of different manipulations (addition of fiber, nanoclay, nucleating agents and chain extender, blending, annealing, use of a higher mold temperature and stereocomplexation) on the heat resistance of poly(lactic acid) (PLA) and poly(hydroxybutyrate) (PHB). Therefore, the differential scanning calorimetry profiles, the vicat softening temperatures and the degradation temperatures were measured and compared to standard PLA, PHB, and polypropylene (PP) as reference materials. Furthermore, a comparison between VST and HDT as parameters for heat resistance was made by examining the deformation during contact with hot water. Stereocomplexation and the use of a higher mold temperature seemed the best techniques to obtain PLA‐based materials with good heat resistance, while other manipulations had little to no effect on the processed biopolymer. The addition of chain extender to PLA and PHB had no effect on processed polymers, but it did improve the thermal degradation of PLA during processing. Furthermore, hot fill tests showed that higher VST values were more reliable as a heat resistant parameter than HDT values for these kinds of application. The VST values of PHB were similar to PP, suggesting that PHB also provides opportunities as a packaging material for food products that undergo a heat treatment. POLYM. ENG. SCI., 58:513–520, 2018. © 2017 Society of Plastics Engineers

show abstract

Section: Resultsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Heat resistance of biobased materials, evaluation and effect of processing techniques and additives

Peelman

Ragaert

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…A recent study showed that the inclusion of ADR to poly(3‐hydroxybutyrate) improved the thermal stability of the blends by increasing the activation energy of the thermal decomposition. The author explained that the enhancement in the thermal stability was due to the increase in the molecular weight and chain rigidity . A recent study showed that the degradation temperature shifted to a higher temperature with the inclusion of ADR on PLA/Polyamide 6 blends .…”

Section: Resultsmentioning

confidence: 99%

“…To enhance the compatibility and the interfacial adhesion between the polymers, an epoxy functionalized chain extender Joncryl ADR (ADR) may be useful for reactive extrusion of (PLA–PBAT)/OL bioblends. The chain extender (ADR) contains an epoxy group, which has the ability to react with the carboxylic and hydroxyl groups present in the polymer components and consequently enhances the compatibility between the polymers …”

Section: Introductionmentioning

confidence: 99%

Thermo‐mechanical characterization of bioblends from polylactide and poly(butylene adipate‐co‐terephthalate) and lignin

Abdelwahab

Taylor

Misra

et al. 2015

Macro Materials & Eng

View full text Add to dashboard Cite

This paper investigates the effect of the incorporation of organosolv lignin and a chain extender on the compatibility between polylactide and poly(butylene adipate-co-terephthalate). Bioblends were processed using melt extrusion and injection molding techniques. A reaction was observed during the melt processing as the force increased as the amount of ADR in the formulation increased. This reaction was investigated by Fourier transform infrared spectroscopy. The morphological images showed a good dispersion and an absence of phase separation by the inclusion of the chain extender. The incorporation of the chain extender enhanced the tensile properties and modulus characterization of the bioblends. Dynamic mechanical analysis and rheological characterization revealed that the addition of chain extender increased the storage modulus of the bioblends. Differential scanning calorimetry analysis showed a good miscibility between PLA and PBAT in the presence of OL and the chain extender, while thermogravimetric analysis showed enhancement in the thermal stability by inclusion of the chain extender.

show abstract

“…Another possibility to retard thermal degradation of PHB is the grafting of various unsaturated monomers, like acrylics as methyl methacrylate, 2‐hydroxyethyl methacrylate, and acrylic acid or maleic anhydride and styrene, respectively . Also the partial branching and crosslinking by an organic peroxide like dicumyl peroxide and a multifunctional coagent, such as triallyl trimesate as well as by the epoxy‐functionalized chain extender Joncryl are routes to improve thermal stability by an increase in activation energy of thermal decomposition . But most of these mentioned routes were performed in solution, in discontinuous batch processes with the help of a laboratory kneader (e.g., from Thermo Scientific Inc. or Brabender GmbH & Co KG) or in a mini‐extruder where in a separate step the PHB have to be coated with the adequate reactive component before feeding into the extruder.…”

Section: Introductionmentioning

confidence: 99%

Thermal and rheological properties of modified polyhydroxybutyrate (PHB)

Weinmann

Bonten

2019

Polymer Engineering & Sci

View full text Add to dashboard Cite

With the discussion of sustainability and the increased environmental awareness, the biopolymer poly‐β‐hydroxybutyrate (PHB) has gained more and more attention in recent years. It derives from renewable sources and can degrade in different environments to carbon dioxide and water. A hindrance for its potential application in plastics parts is its brittleness, deficiency in thermal stability and low crystallization rate. To overcome these problems chemical modification of PHB by reactive extrusion was carried out in a solvent‐free one‐step process by means of a twin screw extruder. Thermal and rheological characterization confirmed the branching and partial crosslinking of PHB by the organic peroxide tert.‐butylperoxybenzoate as well as by the reaction assisted multi‐functional coagents triallyl cyanurate and divinylbenzene. The crystallization temperature of the modified PHB could be significantly increased, up to 16 K, accompanied with an enhanced crystallization rate. Rheological studies show a distinct increase in the melt viscosity and the elastic properties dependent on the modifier content. The addition of plasticizers like rapeseed oil or polyethylene glycols (PEG 1500 and PEG 4000), respectively, lead to an increase in melt extensibility and melt viscosity. In case of PHB modified with PEG 1500, degradation reactions could be substantially retarded. POLYM. ENG. SCI., 59:1057–1064, 2019. © 2019 Society of Plastics Engineers

show abstract

The Effect of Chain Extender on Poly(3-hydroxybutyrate-co-3-hydroxyvalerate): Thermal Degradation, Crystallization, and Rheological Behaviours

Cited by 47 publications

References 42 publications

Heat resistance of biobased materials, evaluation and effect of processing techniques and additives

Heat resistance of biobased materials, evaluation and effect of processing techniques and additives

Thermo‐mechanical characterization of bioblends from polylactide and poly(butylene adipate‐co‐terephthalate) and lignin

Thermal and rheological properties of modified polyhydroxybutyrate (PHB)

Contact Info

Product

Resources

About