Syntheses, characterization, and hydrolytic degradation of <scp>P</scp>(ε‐caprolactone‐co‐δ‐valerolactone) copolymers: Influence of molecular weight

Loriot, Marion; Linossier, Isabelle; Vallée‐Réhel, Karine; Faÿ, Fabienne

doi:10.1002/app.43007

Cited by 9 publications

(11 citation statements)

References 45 publications

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“…Crystallinity percentages (χc) were calculated from the ratio of fusion enthalpy (ΔHf) of the sample to the fusion enthalpy of 100% crystalline polymer (ΔH°f) (Eq. (1)) [16].…”

Section: Instrumental Methodsmentioning

confidence: 99%

Performance Comparison of Commercial and Home-Made Lipases for Synthesis of Poly(δ-valerolactone) Homopolymers

Ulker¹,

Gok²,

Güvenilir³

2019

Journal of Renewable Materials

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Novozyme 435, which is the commercially available immobilized form of Candida antarctica lipase B, has been successfully conducted ring opening polymerization of lactones in organic solvents. In this paper, it was aimed to introduce an alternative biocatalyst for Novozyme 435. Candida antarctica lipase B immobilized onto rice husk ashes via physical adsorption (with a specific activity of 4.4 U/mg) was prepared in previous studies and used as a biocatalyst for poly(δ-valerolactone) synthesis in the present work. Polymerization reactions were proceeded at various reaction temperatures and periods via both two immobilized enzyme preparations. The resulting products were characterized spectroscopically and thermally. The highest molecular weight (Mn = 9010 g/mol) was obtained via Novozyme 435 catalysis at 40℃ and 24 hours. The performance of home-made lipase, which resulted in a molecular weight of 8040 g/mol, was close to commercial one.

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“…Crystallinity percentages (χc) were calculated from the ratio of fusion enthalpy (ΔHf) of the sample to the fusion enthalpy of 100% crystalline polymer (ΔH°f) (Eq. (1)) [16].…”

Section: Instrumental Methodsmentioning

confidence: 99%

Performance Comparison of Commercial and Home-Made Lipases for Synthesis of Poly(δ-valerolactone) Homopolymers

Ulker¹,

Gok²,

Güvenilir³

2019

Journal of Renewable Materials

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“…Hydrolyzable polymers have already been used in the field of antifouling coatings, for the development of biocides-based erodible coatings. Bressy’s group synthesized poly(trialkylsilyl methacrylate)s to develop coatings with tunable erosion profiles [ 36 , 37 , 38 ], Zhang’s and Réhel’s groups worked on degradable polyesters for antifouling applications [ 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ]. Copolymers based on poly(ε-caprolactone), poly(δ-valerolactone), polybutylene succinate, poly(L-lactide), poly(ethylene adipate), and poly(2-methylene-1,3-dioxepane) were synthesized to promote the erosion of the polymer matrix and the controlled release of biocides.…”

Section: Introductionmentioning

confidence: 99%

Hydrolyzable Additive-Based Silicone Elastomers: A New Approach for Antifouling Coatings

et al. 2019

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Fouling Release Coatings are marine antifouling coatings based on silicone elastomers. Contrary to commonly used biocide-based antifouling coatings, they do not release biocides into the marine environment, however, they suffer from poor antifouling efficacy during idle periods. To improve their antifouling performances in static conditions, various amounts of hydrolyzable polymers were incorporated within a silicone matrix. These hydrolyzable polymers were chosen for the well-known hydrolytic degradation mechanism of their main chain, e.g. poly(ε-caprolactone) (PCL), or of their ester pending groups, e.g. poly(bis(trimethylsilyloxy)methylsilyl methacrylate) (PMATM2). The degradation kinetics of such hydrolyzable silicone coatings were assessed by mass loss measurements during immersion in deionized water. Coatings containing PMATM2 exhibited a maximum mass loss after 12 weeks, whereas PCL-based coatings showed no significant mass loss after 24 weeks. Dynamic contact angle measurements revealed the modifications of the coatings surface chemistry with an amphiphilic behavior after water exposure. The attachment of macrofoulers on these coatings were evaluated by field tests in the Mediterranean Sea, demonstrating the short or long-term antifouling effect of these hydrolyzable polymers embedded in the silicone matrix. The settlement of A. amphitrite barnacles on the different coatings indicated inhospitable behaviors towards larval barnacles for coatings with at least 15 wt % of additives.

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“…A series of copolymers were prepared varying by their molecular weight and composition. P(CL-VL) polymers were synthesized in bulk by ring opening polymerization of ε-caprolactone and δ-valerolactone as promoted by octanol and Sn(Oct) 2 upon a coordination-insertion mechanism ( Scheme 1 , Table 3 ) [ 36 ]. The resulting copolyesters were recovered at high yields excepted for polymer 69/31L.…”

Section: Resultsmentioning

confidence: 99%

Influence of Biodegradable Polymer Properties on Antifouling Paints Activity

et al. 2017

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Abstract:The development of new antifouling paints requires understanding the parameters involved in antifouling activity and to develop new analytical tools for their evaluation. A series of biodegradable poly(ε-caprolactone-co-δ-valerolactone) copolymers varying by molecular weight and composition were synthesized, characterized and formulated as antifouling paints. The physico-chemical properties such as hydration, degradation, erosion and lixiviation of paints were studied. Microfouling (bacteria and microalgae) was observed by microscopic observations in a short delay, whereas macrofouling colonization was observed by visual inspection during one year. The antifouling activity of paints was modified by varying the composition and molecular weight of copolymer. The crystallinity appears to play a major role in antifouling activity, however the involvement of other properties such as hydration, degradation or erosion remains difficult to understand. Confocal laser scanning and scanning electron microscopes were used for the evaluation of antifouling paints. Results show that microalgae seem to be a pertinent indicator of antifouling activity.

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Syntheses, characterization, and hydrolytic degradation of P(ε‐caprolactone‐co‐δ‐valerolactone) copolymers: Influence of molecular weight

Abstract: International audienc

Cited by 9 publications

References 45 publications

Performance Comparison of Commercial and Home-Made Lipases for Synthesis of Poly(δ-valerolactone) Homopolymers

Performance Comparison of Commercial and Home-Made Lipases for Synthesis of Poly(δ-valerolactone) Homopolymers

Hydrolyzable Additive-Based Silicone Elastomers: A New Approach for Antifouling Coatings

Influence of Biodegradable Polymer Properties on Antifouling Paints Activity

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