Thermophysical properties of polypentadecanolactone

Skoglund, Peter; Fransson, Åke

doi:10.1016/s0032-3861(97)00473-4

Cited by 22 publications

(25 citation statements)

References 12 publications

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“…Figure shows the effect of the number of methylene groups ( n ) on T m for a collection of polyesters of the [−(CH 2 ) n −COO–] homologous series. Data mined from the literature ( n = 1, PGA; n = 2, P3HA; n = 3, P4HB; n = 4, poly(δ‐valerolactone) (PVL); n = 5, PCL; n = 9, P(ω‐OHC10); n = 13 P(ω‐OHC14); n = 14, PPDL; and n = 15, PHDL) are included in the figure in order to provide a context for the discussion. Because T m of high molecular weight polyesters is not affected much by M n , the trend observed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of monomeric and polymeric structure on the physical properties of thermoplastic polyesters derived from hydroxy fatty acids

Jose

Pourfallah

Leão

et al. 2014

Polymer International

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Section: Resultsmentioning

confidence: 99%

Influence of monomeric and polymeric structure on the physical properties of thermoplastic polyesters derived from hydroxy fatty acids

Jose

Pourfallah

Leão

et al. 2014

Polymer International

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“…The cell also has the P2 1 space‐group symmetry. Several publications2, 4, 9, 10 have characterized the thermal properties of this polymer prepared by chemical methods. For example, Lebedev and Yevstropov2 reported that PPDL has an equilibrium melting point of 97.35 °C, determined using an adiabatic calorimeter.…”

Section: Introductionmentioning

confidence: 99%

“…Zhong et al 4 used DSC to determine the peak melting temperature and enthalpy of fusion of PPDL. Skoglund and Fransson9, 10 reported that the crystallization behavior of PPDL varies substantially for samples of different molecular weights (e.g. M n of 5500, 10 711 and 18 700 g mol −1 ).…”

Section: Introductionmentioning

confidence: 99%

Polypentadecalactone prepared by lipase catalysis: crystallization kinetics and morphology

Cai¹,

Hsiao²,

Gross³

2009

Polymer International

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BACKGROUND: This work addresses the need to better understand the crystallization kinetics and morphology of poly (ω‐pentadecalactone) (PPDL). This polyester has promising mechanical properties and a unique structure that resembles that of polyethylene. PPDL is a member of the poly(ω‐hydroxy fatty acid) family, which can be derived from biobased feedstocks. RESULTS: PPDL (Mn = 34 000 g mol−1 and dispersity D = Mw/Mn = 2.7) was synthesized using enzyme catalysis. Equilibrium melting enthalpy and equilibrium melting point were determined using extrapolation techniques, being 227 J g−1 and 101 °C, respectively. In addition, the equilibrium melting point ($T_{\rm {m}}^{0}$) was found to be 109.3 °C by the nonlinear Hoffman‐Weeks plot. For $T_{\rm {m}}^{0} = 101.0 ^{\circ}\hbox{C}$, the lateral surface free energy (σ), fold surface free energy (σe) and fold work (q) are 10.4 erg cm−2, 47.5 erg cm−2 and 2.6 kcal mol−1, respectively; while for $T_{\rm {m}}^{0} = 109.3 ^{\circ}\hbox{C}$, they are 25.1 erg cm−2, 46.6 erg cm−2 and 2.6 kcal mol−1, respectively. The results indicated the existence of a regime I to regime II transition during crystallization at about 80 °C. Polarized optical microscopy and AFM provided further evidence for the regime I–II transition. In regime I, coarse spherulites were formed through splaying out and occasional branching of lamellae, as well as stacking of lamellae through screw dislocation. In contrast, in regime II, banded spherulites were formed through crystal twisting. CONCLUSION: Morphological changes in PPDL at spherulitic and lamellar levels in regimes I and II were confirmed by differential scanning calorimetry, POM and AFM. Copyright © 2009 Society of Chemical Industry

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“…It is well documented that large-membered lactones have little ring-strain and consequently are extremely difficult to polymerize by non-enzymatic methods. Several investigators have reported on polyesters derived from macrolactones [8][9][10][11] , but in all cases, no detailed description of the polymerization was given. Just recently, it was demonstrated clearly that 12 and 13-membered lactones could undergo ring-opening polymerization using an alkali metal methoxide as initiator 12) .…”

Section: Introductionmentioning

confidence: 99%

Controlled ring-opening polymerization of -pentadecalactone with yttrium isopropoxide as an initiator

Zhong

Dijkstra

Feijén³

2000

Macromol. Chem. Phys.

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The ring‐opening polymerization of ω‐pentadecalactone (PDL), a 16‐membered lactone, in the bulk and in solution using yttrium isopropoxide as an initiator was investigated. All isopropoxide groups of yttrium isopropoxide participated in the initiation and the polymerization took place via acyl‐oxygen cleavage of the monomer. The molecular weights of the resulting polymers could be controlled effectively by varying the monomer/initiator ratio. An induction period was observed for the bulk polymerization conducted at 60°C. DSC analyses indicated that poly(ω‐pentadecalactone) is a highly crystalline polymer, having a high crystallization rate.

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Thermophysical properties of polypentadecanolactone

Cited by 22 publications

References 12 publications

Influence of monomeric and polymeric structure on the physical properties of thermoplastic polyesters derived from hydroxy fatty acids

Influence of monomeric and polymeric structure on the physical properties of thermoplastic polyesters derived from hydroxy fatty acids

Polypentadecalactone prepared by lipase catalysis: crystallization kinetics and morphology

Controlled ring-opening polymerization of -pentadecalactone with yttrium isopropoxide as an initiator

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