Synthesis of poly(lactic acid-b-p-dioxanone) block copolymers from ring opening polymerization of p-dioxanone by poly(L-lactic acid) macroinitiators

Li, Bin; Chen, Si‐Chong; Qiu, Zhi-Cheng; Yang, Ke‐Ke; Tang, Song-Ping; Yu, Wenjing; Wang, Yu‐Zhong

doi:10.1007/s00289-008-0939-1

Cited by 24 publications

(14 citation statements)

References 15 publications

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“…On the other hand, this polymer has some drawbacks as well, including moisture sensitivity, fast physical ageing, poor impact resistance and relatively high price [4][5][6]. As a consequence, many attempts are made to modify it by plasticization [7][8][9][10][11][12][13], copolymerization [14][15][16][17][18][19], blending [20,21] or by the production of composites [11][12][13][22][23][24][25][26][27][28][29][30]. The modification of polymers by blending is a mature technology developed in the 70 ies or even earlier.…”

Section: Introductionmentioning

confidence: 99%

Interactions, structure and properties in poly(lactic acid)/thermoplastic polymer blends

Imre

Renner

Pukánszky

2014

Express Polym. Lett.

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Abstract. Blends were prepared from poly(lactic acid) (PLA) and three thermoplastics, polystyrene (PS), polycarbonate (PC) and poly(methyl methacrylate) (PMMA). Rheological and mechanical properties, structure and component interactions were determined by various methods. The results showed that the structure and properties of the blends cover a relatively wide range. All three blends have heterogeneous structure, but the size of the dispersed particles differs by an order of magnitude indicating dissimilar interactions for the corresponding pairs. Properties change accordingly, the blend containing the smallest dispersed particles has the largest tensile strength, while PLA/PS blends with the coarsest structure have the smallest. The latter blends are also very brittle. Component interactions were estimated by four different methods, the determination of the size of the dispersed particles, the calculation of the Flory-Huggins interaction parameter from solvent absorption, from solubility parameters, and by the quantitative evaluation of the composition dependence of tensile strength. All approaches led to the same result indicating strong interaction for the PLA/PMMA pair and weak for PLA and PS. A general correlation was established between interactions and the mechanical properties of the blends.

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Section: Introductionmentioning

confidence: 99%

Interactions, structure and properties in poly(lactic acid)/thermoplastic polymer blends

Imre

Renner

Pukánszky

2014

Express Polym. Lett.

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“…Recently the interest in poly(lactic acid) (PLA) as well as in its copolymers [1][2][3][4][5][6][7], blends [8,9] and composites [10][11][12][13][14][15][16][17][18][19][20][21] increased enormously for various reasons. PLA has several advantages compared to fossil fuel based polymers.…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the properties of PLA/CaSO4 composites: homogeneity and interactions

Molnár

Móczó

Murariu

et al. 2009

Express Polym. Lett.

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Abstract. Composites were prepared from poly(lactic acid) (PLA) and a natural CaSO4 filler to study the developed structure and the interaction of the components. The filler was characterized very thoroughly by several techniques and the results indicated that the filler contains a considerable amount of small particles with size much below the volume average size of 4.4 μm. The presence of these small particles did not result in inhomogeneity, considerable extent of aggregation was not observed in the composites. The filler was coated with stearic acid to modify interactions and optimum coverage corresponded to the amount estimated from the specific surface area of the filler. Mechanical properties changed only slightly with increasing amounts of the uncoated filler, but coating resulted in a drastic change of tensile properties and deformation behavior. Considerable plastic flow was observed around filler particles on the fracture surface of broken specimens. The quantitative estimation of interfacial interactions and their comparison to existing data proved that the interaction of PLA and CaSO4 corresponds to values observed in other mineral filled polymers. On the other hand, the reinforcing effect of the coated filler is extremely poor indicating almost zero interaction. Additional experiments proved that considerable amount of stearic acid dissolves in PLA and plasticizes the polymer. Stearic acid seems to desorb also from the surface of the filler, dissolve in the polymer and modify matrix properties.

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“…On the other hand, this polymer has some drawbacks as well, including moisture sensitivity, fast physical ageing, poor impact resistance and relatively high price [4][5][6]. As a consequence, many attempts have been made to modify it by plasticization [7][8][9][10][11][12][13], copolymerization [14][15][16][17][18][19], blending [20,21] or by the production of particulate filled or fiber reinforced composites [11][12][13][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Structure, properties and interfacial interactions in poly(lactic acid)/polyurethane blends prepared by reactive processing

Imre

Bedő

Domján

et al. 2013

European Polymer Journal

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Synthesis of poly(lactic acid-b-p-dioxanone) block copolymers from ring opening polymerization of p-dioxanone by poly(L-lactic acid) macroinitiators

Cited by 24 publications

References 15 publications

Interactions, structure and properties in poly(lactic acid)/thermoplastic polymer blends

Interactions, structure and properties in poly(lactic acid)/thermoplastic polymer blends

Factors affecting the properties of PLA/CaSO4 composites: homogeneity and interactions

Structure, properties and interfacial interactions in poly(lactic acid)/polyurethane blends prepared by reactive processing

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