Can poly(ε-caprolactone) crystals nucleate glassy polylactide?

Rizzuto, Matteo; Marinetti, Loris; Caretti, Daniele; Múgica, Agurtzane; Zubitur, Manuela; Müller, Alejandro J.

doi:10.1039/c7ce00578d

Cited by 20 publications

(32 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The crystallization of PLA as a major component in PLA/PCL blends will be considered first. A clear acceleration of PLA overall crystallization rate in the presence of 20 wt% PCL has been reported [16]. For example, the time to complete crystallization at 120 °C is 1.5 min in the blend, with respect to 8 minutes in the pure PLA.…”

mentioning

confidence: 66%

“…Indeed, nucleation is commonly encountered at foreign surfaces, and it can thus be increased due to impurities/heterogeneities migration between the different phases during the blending process or to the presence of polymer/polymer interfaces. [1,2,10,[13][14][15][16][17]. The opposite situation, i.e., a decrease of crystallization kinetics, is also commonly observed whenever the crystallizable polymers are separated in a "sufficiently high" number of individual domains.…”

Section: Crystallization Behavior In Immiscible Blendsmentioning

confidence: 99%

“…results in large decrease in the size of the dispersed phase, in comparison with the non-compatibilized blend. The addition of a copolymer-based compatibilizer, in general, has remarkable influence on the crystallization behavior of the blend components, because of the large effect on the morphology of the system, which results either in a decrease in the size of the dispersed phase or in the formation of a percolated/cocontinuous morphology [8,13,16,38,39]. Tol et al [26], Yordanov and Minkova [28], studied the reactive compatibilization of the immiscible blends polystyrene/polyamide 6 (PS/PA6) and Low density polyethylene/polystyrene (LDPE/PS), using different kind of copolymer compatibilizers.…”

Section: Crystallization In Presence Of Compatibilizers and Nanopartimentioning

confidence: 99%

“…PCL is a biodegradable polyester with a very flexible chain, characterized by a low glass transition temperature ( -60°C), although the melting and crystallization also occur in the lowtemperature range at around 60 and 30°C, respectively. In this section, the main works dealing with the crystallization behavior of these blends, including the effect of composition and additives, are summarized [16,31,32,36,38,[59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78]. Table 2 provides a compendium of the related studies.…”

Section: Poly (Lactic Acid) / Poly (-Caprolactone) Blendsmentioning

confidence: 99%

See 3 more Smart Citations

Nucleation and Crystallization in Bio-Based Immiscible Polyester Blends

Fenni

Cavallo

Müller

2019

Advances in Polymer Science

Self Cite

View full text Add to dashboard Cite

Bio-based thermoplastic polyesters are highly promising materials as they combine interesting thermal and physical properties and in many cases biodegradability. However, sometimes the best property balance can only be achieved by blending in order to improve barrier properties, biodegradability or mechanical properties. Nucleation, crystallization and morphology are key factors that can dominate all these properties in crystallizable biobased polyesters. Therefore, their understanding, prediction and tailoring is essential. In this work, after a brief introduction about immiscible polymer blends, we summarize the crystallization behavior of the most important bio-based (and immiscible) polyester blends, considering examples of double-crystalline components. Even though in some specific blends (e.g., polylactide/polycaprolactone) many efforts have been made to understand the influence of blending on the nucleation, crystallization and morphology of the parent components, there are still many points that have yet to be understood. In the case of other immiscible polyester blends systems, the literature is scarce, opening up opportunities in this environmentally important research topic.

show abstract

mentioning

confidence: 66%

Section: Crystallization Behavior In Immiscible Blendsmentioning

confidence: 99%

Section: Crystallization In Presence Of Compatibilizers and Nanopartimentioning

confidence: 99%

Section: Poly (Lactic Acid) / Poly (-Caprolactone) Blendsmentioning

confidence: 99%

See 2 more Smart Citations

Nucleation and Crystallization in Bio-Based Immiscible Polyester Blends

Fenni

Cavallo

Müller

2019

Advances in Polymer Science

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is well known that PLA homopolymers have a slow crystallization kinetics when cooled from the melt, but during cooling and vitrification their nucleation density can be greatly enhanced. Therefore, when heated from the glassy state they can undergo cold-crystallization [32][33][34][35]. During the second heating scan, PLLA and PDLA homopolymers melt at around 140 °C (see Table 4) while PBS melts at 110 °C.…”

Section: Non-isothermal Crystallizationmentioning

confidence: 99%

Crystallization and Stereocomplexation of PLA-mb-PBS Multi-Block Copolymers

et al. 2017

View full text Add to dashboard Cite

Abstract:The crystallization and morphology of PLA-mb-PBS copolymers and their corresponding stereocomplexes were studied. The effect of flexible blocks (i.e., polybutylene succinate, PBS) on the crystallization of the copolymers and stereocomplex formation were investigated using polarized light optical microscopy (PLOM), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR), and carbon-13 nuclear magnetic resonance spectroscopy ( 13 C-NMR). The PLA and PBS multiple blocks were miscible in the melt and in the glassy state. When the PLA-mb-PBS copolymers are cooled from the melt, the PLA component crystallizes first creating superstructures, such as spherulites or axialites, which constitute a template within which the PBS component has to crystallize when the sample is further cooled down. The Avrami theory was able to fit the overall crystallization kinetics of both semi-crystalline components, and the n values for both blocks in all the samples had a correspondence with the superstructural morphology observed by PLOM. Solution mixtures of PLLA-mb-PBS and PLDA-mb-PBS copolymers were prepared, as well as copolymer/homopolymer blends with the aim to study the stereocomplexation of PLLA and PDLA chain segments. A lower amount of stereocomplex formation was observed in copolymer mixtures as compared to neat L 100 /D 100 stereocomplexes. The results show that PBS chain segments perturb the formation of stereocomplexes and this perturbation increases with the amount of PBS in the samples. However, when relatively low amounts of PBS in the copolymer blends are present, the rate of stereocomplex formation is enhanced. This effect dissappears when higher amounts of PBS are present. The stereocomplexation was confirmed by FTIR and solid state 13 C-NMR analyses.

show abstract

Blends of Bio‐Based Poly(Limonene Carbonate) with Commodity Polymers

Neumann

Bretschneider

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

In this study, blends of the bio‐based poly(limonene carbonate) (PLimC) with different commodity polymers are investigated in order to explore the potential of PLimC toward generating more sustainable polymer materials by reducing the amount of petro‐ or food‐based polymers. PLimC is employed as minority component in the blends. Next to the morphology and thermal properties of the blends the impact of PLimC on the mechanical properties of the matrix polymers is studied. The interplay of incompatibility and zero‐shear melt viscosity contrast determines the blend morphology, leading for all blends to a dispersed droplet morphology for PLimC. Blends with polymers of similar structure to PLimC (i.e., aliphatic/aromatic polyester) show the best performance with respect to mechanical properties, whereas blends with polystyrene or poly(methyl methacrylate) are too brittle and polyamide 12 blends show very low elongations at break. In blends with Ecoflex (poly(butylene adipate‐co‐terephthalate)) and Arnitel EM400 (copoly(ether ester)) with poly(butylene terephthalate) hard and polytetrahydrofuran soft segments) a threefold increase in E‐modulus can be achieved, while keeping the elongation at break at reasonable high values of ≈200%, making these blends highly interesting for applications.

show abstract

Can poly(ε-caprolactone) crystals nucleate glassy polylactide?

Cited by 20 publications

References 62 publications

Nucleation and Crystallization in Bio-Based Immiscible Polyester Blends

Nucleation and Crystallization in Bio-Based Immiscible Polyester Blends

Crystallization and Stereocomplexation of PLA-mb-PBS Multi-Block Copolymers

Blends of Bio‐Based Poly(Limonene Carbonate) with Commodity Polymers

Contact Info

Product

Resources

About