Properties of thermoplastic blends: starch–polycaprolactone

Avérous, Luc; Moro, L.; Dole, Patrice; Fringant, C.

doi:10.1016/s0032-3861(99)00636-9

Cited by 501 publications

(306 citation statements)

References 15 publications

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“…The dependence noticed between mechanical response to compression over temperature can be explained by the polymeric nature of the scaffolds [23], as polymers becomes softer at higher temperature due to the weaker bonds between adjacent polymeric chains. These thermal properties were previously reported for PCL scaffolds tested either as a compact [24], [25] or a 3D structure [14], [16].…”

Section: Discussionsupporting

confidence: 84%

Mechanical response of 3D Insert® PCL to compression

Brunelli

Perrault

Lacroix

2017

Journal of the Mechanical Behavior of Biomedical Materials

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ReuseThis article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs (CC BY-NC-ND) licence. This licence only allows you to download this work and share it with others as long as you credit the authors, but you can't change the article in any way or use it commercially. More information and the full terms of the licence here: https://creativecommons.org/licenses/ Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request.

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Section: Discussionsupporting

confidence: 84%

Mechanical response of 3D Insert® PCL to compression

Brunelli

Perrault

Lacroix

2017

Journal of the Mechanical Behavior of Biomedical Materials

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“…Another potential cause was the hydrophilic character of starch, which would lead to poor adhesion with the hydrophobic PHB. Similar phenomena had been reported by Averous et al [31], who studied the properties of thermoplastic starch and its blends with polycaprolactone. The decrease in T m was due to the lower melt viscosity of starch as compared to that of PHB [32].…”

Section: Dsc Analysissupporting

confidence: 86%

Performance of an acrylic-acid-grafted poly(3-hydroxybutyric acid)/starch bio-blend: characterization and physical properties

Liao

2007

Designed Monomers and Polymers

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Abstract-In this study, a fully biodegradable poly(3-hydroxybutyric acid) (PHB) and starch blend (PHB/starch) was prepared by means of a melt-blending method. In addition, the acrylic-acid-grafted PHB (PHB-g-AA) was studied as an alternative to PHB. It was found that the dispersion of starch in the polymer matrix and the water resistance of PHB-g-AA/starch were better those of PHB/starch, due to the formation of ester carbonyl function group via reaction between the -OH group of starch and the anhydride carbonyl group of PHB-g-AA. As the result of mechanical test, the PHB-g-AA/starch blends not only gave larger values of tensile strength than those of the PHB/starch blends, but also provided a plateau value of tensile strength when the starch content was up to 50 wt%. Furthermore, the PHB-g-AA/starch was more easily processed than the PHB/starch because the former had lower melt viscosity than the latter. Biodegradation tests of blends were also studied under the enzymatic environment, and the result showed that the mass of blends reduced by about the starch content within 6 weeks.

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“…The values show that the contact angle of the blend PU2 and PU3 is comparatively closer to PU5 in spite of having higher and equal fraction of PU1 respectively. This indicates a possible phase separation between the components of the polyurethanes with the PCL based polyurethanes migrating from the bulk to the surface [14].…”

Section: Contact Anglementioning

confidence: 97%

Blends of L-tyrosine based polyurethanes for biomaterial applications

Sarkar¹,

J-C²,

Klettlinger³

et al. 2007

Express Polym. Lett.

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Abstract. Three polyurethane blends were made from segmented polyurethanes synthesized from desaminotyrosyl tyrosine hexyl ester (DTH), an L-tyrosine based diphenolic dipeptide, as chain extender. The soft segment of these polyurethanes is either polyethylene glycol (PEG) or polycaprolactone diol (PCL) and the diisocyanate is hexamethylene diisocyanate (HDI). The blends were developed to investigate the effect of varying composition on the overall physical, thermal, mechanical, surface and degradation properties of the material. The characterization results show that the properties of these blended materials can be controlled by adjusting the composition. Blends with increased PEG based polyurethane exhibited more water absorption and higher degradation characteristics. With increasing PCL based polyurethane, the mechanical properties of the blends were improved although the blends were relatively more amorphous in nature. The L-tyrosine based polyurethane blends hold the potential for use in different biomaterial applications.Keywords: polymer blends and alloys, L-tyrosine, polyurethane, poly(caprolactone), poly(ethylene glycol) eXPRESS Polymer Letters Vol.1, No.11 (2007) [724][725][726][727][728][729][730][731][732][733] Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2007.100 urethanes are either PEG or PCL and the diisocyanate is hexamethylene diisocyanate (HDI). These polyurethanes have a wide range of physicomechanical properties that are suitable for tissue engineering applications. The structures of the polyurethanes are shown in Figure 1. The polyurethanes synthesized from PEG exhibit poor mechanical properties and a high rate of degradation whereas PCL based polyurethanes have better mechanical properties but very slow degradation rates. In this work, three blends of L-tyrosine based polyurethanes were fabricated by using different compositions of the two polyurethanes. Structural and morphological characterization of the blends was carried out by spectroscopic, thermal and microscopic techniques. In addition, contact angle, water absorption and hydrolytic degradation studies were done to investigate the applicability of the systems for biomaterial applications. Experimental MaterialsL-tyrosine, desaminotyrosine, Ethyl-N'-dimethylaminopropyl carbodiimide (EDC.HCl), polyethylene glycol(PEG), poly caprolactone diol(PCL), hexamethylene diisocyanate (HDI) were obtained from Sigma Aldrich, St. Louis(MO) USA. n-Hexanol, tetrahydrofuran, N-N'dimethylformamide (DMF), and chloroform were obtained from Fisher Scientific, Pittsburgh(PA) USA. The solvents were analytical grade and were used as received, unless otherwise mentioned. De-ionized water was used for all purposes. Two different L-tyrosine based polyurethanes were synthesized from either polycaprolactone diol (PCL, M w = 1250 g/mol) or polyethylene glycol (PEG, M w = 1000 g/mol), as the polyol and hexamethylene diisocyanate (HDI) as the diisocyanate. The chain extender was desaminotyrosyl tyrosine hexyl ester (DTH), a di...

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Properties of thermoplastic blends: starch–polycaprolactone

Cited by 501 publications

References 15 publications

Mechanical response of 3D Insert® PCL to compression

Mechanical response of 3D Insert® PCL to compression

Performance of an acrylic-acid-grafted poly(3-hydroxybutyric acid)/starch bio-blend: characterization and physical properties

Blends of L-tyrosine based polyurethanes for biomaterial applications

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