1
|
Targońska S, Dobrzyńska-Mizera M, Di Lorenzo ML, Knitter M, Longo A, Dobrzyński M, Rutkowska M, Barnaś S, Czapiga B, Stagraczyński M, Mikulski M, Muzalewska M, Wyleżoł M, Rewak-Soroczyńska J, Nowak N, Andrzejewski J, Reeks J, Wiglusz RJ. Design, clinical applications and post-surgical assessment of bioresorbable 3D-printed craniofacial composite implants. Biomater Sci 2024; 12:3374-3388. [PMID: 38787753 DOI: 10.1039/d3bm01826a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
This study details the design, fabrication, clinical trials' evaluation, and analysis after the clinical application of 3D-printed bone reconstruction implants made of nHAp@PLDLLA [nanohydroxyapatite@poly(L-lactide-co-D,L-lactide)] biomaterial. The 3D-printed formulations have been tested as bone reconstruction Cranioimplants in 3 different medical cases, including frontal lobe, mandibular bone, and cleft palate reconstructions. Replacing one of the implants after 6 months provided a unique opportunity to evaluate the post-surgical implant obtained from a human patient. This allowed us to quantify physicochemical changes and develop a spatial map of osseointegration and material degradation kinetics as a function of specific locations. To the best of our knowledge, hydrolytic degradation and variability in the physicochemical and mechanical properties of the biomimetic, 3D-printed implants have not been quantified in the literature after permanent placement in the human body. Such analysis has revealed the constantly changing properties of the implant, which should be considered to optimize the design of patient-specific bone substitutes. Moreover, it has been proven that the obtained composition can produce biomimetic, bioresorbable and bone-forming alloplastic substitutes tailored to each patient, allowing for shorter surgery times and faster patient recovery than currently available methods.
Collapse
Affiliation(s)
- Sara Targońska
- Institute of Low Temperature and Structure Research, PAS, Okolna 2, PL-50-422 Wroclaw, Poland.
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Box 7015, 75007 Uppsala, Sweden
| | - Monika Dobrzyńska-Mizera
- Institute of Materials Technology, Polymer Division, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland.
| | - Maria Laura Di Lorenzo
- National Research Council (CNR), Institute of Polymers, Composites and Biomaterials (IPCB), Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy.
| | - Monika Knitter
- Institute of Materials Technology, Polymer Division, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland.
| | - Alessandra Longo
- National Research Council (CNR), Institute of Polymers, Composites and Biomaterials (IPCB), Via Campi Flegrei, 34, 80078 Pozzuoli (NA), Italy.
- National Research Council (CNR), Institute of Polymers, Composites and Biomaterials (IPCB), Via Paolo Gaifami 18, 95126, Catania, CT, Italy
| | - Maciej Dobrzyński
- Department of Pediatric Dentistry and Preclinical Dentistry, Wroclaw Medical University, Krakowska 26, 50-425 Wroclaw, Poland
| | - Monika Rutkowska
- 4th Military Teaching Hospital, R. Weigla, PL-50-981 Wroclaw, Poland
| | - Szczepan Barnaś
- 4th Military Teaching Hospital, R. Weigla, PL-50-981 Wroclaw, Poland
| | - Bogdan Czapiga
- 4th Military Teaching Hospital, R. Weigla, PL-50-981 Wroclaw, Poland
| | | | | | - Małgorzata Muzalewska
- Department of Fundamentals of Machinery Design, Faculty of Mechanical Engineering Silesian University of Technology, Gliwice, Poland.
| | - Marek Wyleżoł
- Department of Fundamentals of Machinery Design, Faculty of Mechanical Engineering Silesian University of Technology, Gliwice, Poland.
| | | | - Nicole Nowak
- Institute of Low Temperature and Structure Research, PAS, Okolna 2, PL-50-422 Wroclaw, Poland.
| | - Jacek Andrzejewski
- Institute of Materials Technology, Polymer Division, Poznan University of Technology, Piotrowo 3, 61-138 Poznan, Poland.
| | - John Reeks
- Institute of Low Temperature and Structure Research, PAS, Okolna 2, PL-50-422 Wroclaw, Poland.
| | - Rafal J Wiglusz
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland.
- Institute of Low Temperature and Structure Research, PAS, Okolna 2, PL-50-422 Wroclaw, Poland.
| |
Collapse
|
2
|
Andrianov RA, Schmelzer JWP, Androsch R, Mukhametzyanov TA, Schick C. Radial growth rate of near-critical crystal nuclei in poly(l-lactic acid) (PLLA) in Tammann's two-stage development method. J Chem Phys 2023; 158:054504. [PMID: 36754785 DOI: 10.1063/5.0134462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The specific features of crystal nucleation widely determine the morphology of the evolving crystalline material. Crystal nucleation is, as a rule, not accessible by direct observation of the nuclei, which develop with time. This limitation is caused by the small size (nanometer scale) of the critical nuclei and the stochastic nature of their formation. We describe an experimental approach to the determination of specific features of the cluster size distribution employing fast scanning calorimetry at scanning rates up to 10 000 K s-1. The surviving cluster fraction is determined by selectively melting/dissolving clusters smaller than the critical size corresponding to the highest temperature of a short spike positioned between the nucleation and the development stage in Tammann's two-stage method. This approach allows for estimating the time evolution of the radius of the largest detectable clusters in the distribution. Knowing this radius as a function of nucleation time allows for determining a radial growth rate. In the example of poly(l-lactic acid) (PLLA), the order of magnitude estimate of radial growth rates of clusters of about 2-5 nm yields values between 10-5 and 10-3 nm s-1. The radial growth rate of micrometer-sized spherulites is available from optical microscopy. The corresponding values are about three orders of magnitude higher than the values for the nanometer-sized clusters. This difference is explainable by stochastic effects, transient features, and the size dependence of the growth processes on the nanometer scale. The experimental and (order of magnitude) classical nucleation theory estimates agree well.
Collapse
Affiliation(s)
- Ruslan A Andrianov
- Department of Physical Chemistry, Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation
| | - Jürn W P Schmelzer
- Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany
| | - René Androsch
- Interdisciplinary Center for Transfer-Oriented Research in Natural Sciences, Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany
| | - Timur A Mukhametzyanov
- Department of Physical Chemistry, Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation
| | - Christoph Schick
- Department of Physical Chemistry, Kazan Federal University, 18 Kremlyovskaya Street, Kazan 420008, Russian Federation
| |
Collapse
|
3
|
Zennaki A, Zair L, Arabeche K, Benkraled L, Maschke U, Berrayah A. Effect of annealing on thermal and dynamic mechanical properties of poly(lactic acid). J Appl Polym Sci 2022. [DOI: 10.1002/app.53095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Assia Zennaki
- Laboratoire de Recherche sur les Macromolécules, Faculté des Sciences Université Aboubakr Belkaïd Tlemcen Algeria
| | - Latifa Zair
- Laboratoire de Recherche sur les Macromolécules, Faculté des Sciences Université Aboubakr Belkaïd Tlemcen Algeria
| | - Khadidja Arabeche
- Laboratoire de Recherche sur les Macromolécules, Faculté des Sciences Université Aboubakr Belkaïd Tlemcen Algeria
| | - Lina Benkraled
- Laboratoire de Recherche sur les Macromolécules, Faculté des Sciences Université Aboubakr Belkaïd Tlemcen Algeria
| | - Ulrich Maschke
- UMET – Unité Matériaux et Transformations, UMR 8207, University of Lille, CNRS, INRAE, Centrale Lille Lille France
| | - Abdelkader Berrayah
- Laboratoire de Recherche sur les Macromolécules, Faculté des Sciences Université Aboubakr Belkaïd Tlemcen Algeria
| |
Collapse
|
4
|
Parametric Investigation and Optimization to Study the Effect of Process Parameters on the Dimensional Deviation of Fused Deposition Modeling of 3D Printed Parts. Polymers (Basel) 2022; 14:polym14173667. [PMID: 36080740 PMCID: PMC9460270 DOI: 10.3390/polym14173667] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/25/2022] [Accepted: 09/02/2022] [Indexed: 11/17/2022] Open
Abstract
Fused deposition modeling (FDM) is the most economical additive manufacturing (AM) technology available for fabricating complex part geometries. However, the involvement of numerous control process parameters and dimensional instabilities are challenges of FDM. Therefore, this study investigated the effect of 3D printing parameters on dimensional deviations, including the length, width, height, and angle of polylactic acid (PLA) printed parts. The selected printing parameters include layer height, number of perimeters, infill density, infill angle, print speed, nozzle temperature, bed temperature, and print orientation. Three-level definitive screening design (DSD) was used to plan experimental runs. The results revealed that infill density is the most consequential parameter for length and width deviation, while layer height is significant for angle and height deviation. The regression models developed for the four responses are non-linear quadratic. The optimal results are obtained considering the integrated approach of desirability and weighted aggregated sum product assessment (WASPAS). The optimal results include a layer height of 0.1 mm, a total of six perimeters, an infill density of 20%, a fill angle of 90°, a print speed of 70 mm/s, a nozzle temperature of 220 °C, a bed temperature of 70 °C, and a print orientation of 90°. The current study provides a guideline to fabricate assistive devices, such as hand and foot orthoses, that require high dimensional accuracies.
Collapse
|
5
|
D′Urso L, Acocella MR, De Santis F, Guerra G, Pantani R. Poly(l-lactic acid) nucleation by alkylated carbon black. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
6
|
Marano S, Laudadio E, Minnelli C, Stipa P. Tailoring the Barrier Properties of PLA: A State-of-the-Art Review for Food Packaging Applications. Polymers (Basel) 2022; 14:1626. [PMID: 35458376 PMCID: PMC9029979 DOI: 10.3390/polym14081626] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 04/07/2022] [Accepted: 04/08/2022] [Indexed: 02/01/2023] Open
Abstract
It is now well recognized that the production of petroleum-based packaging materials has created serious ecological problems for the environment due to their resistance to biodegradation. In this context, substantial research efforts have been made to promote the use of biodegradable films as sustainable alternatives to conventionally used packaging materials. Among several biopolymers, poly(lactide) (PLA) has found early application in the food industry thanks to its promising properties and is currently one of the most industrially produced bioplastics. However, more efforts are needed to enhance its performance and expand its applicability in this field, as packaging materials need to meet precise functional requirements such as suitable thermal, mechanical, and gas barrier properties. In particular, improving the mass transfer properties of materials to water vapor, oxygen, and/or carbon dioxide plays a very important role in maintaining food quality and safety, as the rate of typical food degradation reactions (i.e., oxidation, microbial development, and physical reactions) can be greatly reduced. Since most reviews dealing with the properties of PLA have mainly focused on strategies to improve its thermal and mechanical properties, this work aims to review relevant strategies to tailor the barrier properties of PLA-based materials, with the ultimate goal of providing a general guide for the design of PLA-based packaging materials with the desired mass transfer properties.
Collapse
Affiliation(s)
- Stefania Marano
- Department of Science and Engineering of Matter, Environment and Urban Planning, Marche Polytechnic University, 60131 Ancona, Italy; (E.L.); (P.S.)
| | - Emiliano Laudadio
- Department of Science and Engineering of Matter, Environment and Urban Planning, Marche Polytechnic University, 60131 Ancona, Italy; (E.L.); (P.S.)
| | - Cristina Minnelli
- Department of Life and Environmental Sciences, Marche Polytechnic University, 60131 Ancona, Italy;
| | - Pierluigi Stipa
- Department of Science and Engineering of Matter, Environment and Urban Planning, Marche Polytechnic University, 60131 Ancona, Italy; (E.L.); (P.S.)
| |
Collapse
|
7
|
Cifuentes SC, Saldaña L, Gónzalez‐Carrasco JL, Benavente R, García‐Peñas A. Effect of Thermal Processing on the Dynamic/Isothermal Crystallization and Cytocompatibility of Polylactic Acid for Biomedical Applications. MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sandra C. Cifuentes
- Área de Ciencia e Ingeniería de Materiales ESCET Universidad Rey Juan Carlos C/Tulipán s/n, >Móstoles Madrid 28933 Spain
| | - Laura Saldaña
- Grupo de Fisiopatología Ósea y Biomateriales Hospital Universitario La Paz‐IdiPAZ Paseo de la Castellana 261 Madrid 28046 Spain
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER‐BBN) Madrid 28029 Spain
| | - José Luis Gónzalez‐Carrasco
- CIBER de Bioingeniería Biomateriales y Nanomedicina (CIBER‐BBN) Madrid 28029 Spain
- Centro Nacional de Investigaciones Metalúrgicas CENIM‐CSIC Avda. Gregorio del Amo 8 Madrid 28040 Spain
| | - Rosario Benavente
- Instituto de Ciencia y Tecnología de Polímeros ICTP‐CSIC Juan de la Cierva 3 Madrid 28006 Spain
| | - Alberto García‐Peñas
- Departamento de Ciencia e Ingeniería de Materiales e Ingeniería Química IAAB Universidad Carlos III de Madrid Avda. de la Universidad, 30, Leganés Madrid 28911 Spain
| |
Collapse
|
8
|
In-Situ Isothermal Crystallization of Poly(l-lactide). Polymers (Basel) 2021; 13:polym13193377. [PMID: 34641192 PMCID: PMC8512243 DOI: 10.3390/polym13193377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/26/2021] [Accepted: 09/28/2021] [Indexed: 11/17/2022] Open
Abstract
The isothermal crystallization of poly(l-lactide) (PLLA) has been investigated by in-situ wide angle X-ray diffraction (WAXD) and polarized optical microscopes (POM) equipped with a hot-stage accessory. Results showed that the spherulites of PLLA were formed at high temperature, whereas irregular morphology was observed under a low temperature. This can be attributed to the varying rates of crystallization of PLLA at different temperatures. At low temperatures, the nucleation rate is fast and hence the chains diffuse very slow, resulting in the formation of imperfect crystals. On the other hand, at high temperatures, the nucleation rate is slow and the chains diffuse fast, leading to the formation of perfect crystals. The change in the value of the Avrami exponent with temperature further verifies the varying trend in the morphological feature of the crystals.
Collapse
|
9
|
Du F, Yener HE, Hillrichs G, Boldt R, Androsch R. Crystallization-Induced Polymer Scaffold Formation in the Polymer/Drug Delivery System Poly(l-lactic acid)/Ethyl Butylacetylaminopropionate (PLLA/IR3535). Biomacromolecules 2021; 22:3950-3959. [PMID: 34428015 DOI: 10.1021/acs.biomac.1c00760] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polymer/mosquito-repellent scaffolds exhibit increasing importance in long-lasting human skin protection to be used as wearable devices and allowing for controlled release of repellents. In this study, ethyl butylacetylaminopropionate (IR3535) was used as a human and environmental friendly active mosquito-repellent serving as a solvent to form functional poly(l-lactic acid) (PLLA) scaffolds by crystallization-based solid-liquid thermally induced phase separation. Crystallization of PLLA in the presence of IR3535 is faster than melt-crystallization of neat PLLA, and in the investigated concentration range from 5 to 50 mass % PLLA, its maximum crystallization rate increases with the PLLA content, by both, increases of the maximum crystal growth rate and of the nuclei density. By adjusting the polymer concentration and the crystallization temperature, microporous scaffolds of different fine structures are obtained, hosting the mosquito-repellent in intra- and interspherulitic pores for its intended later evaporation.
Collapse
Affiliation(s)
- Fanfan Du
- Interdisciplinary Center for Transfer-oriented Research in Natural Sciences (IWE TFN), Martin Luther University Halle-Wittenberg, D-06099 Halle/Saale, Germany
| | - Hande Ece Yener
- Interdisciplinary Center for Transfer-oriented Research in Natural Sciences (IWE TFN), Martin Luther University Halle-Wittenberg, D-06099 Halle/Saale, Germany
| | - Georg Hillrichs
- Department of Engineering and Natural Sciences, University of Applied Sciences Merseburg, D-06217 Merseburg, Germany
| | - Regine Boldt
- Leibniz-Institut für Polymerforschung e. V. Dresden (IPF), Hohe Strasse 6, D-01069 Dresden, Germany
| | - René Androsch
- Interdisciplinary Center for Transfer-oriented Research in Natural Sciences (IWE TFN), Martin Luther University Halle-Wittenberg, D-06099 Halle/Saale, Germany
| |
Collapse
|
10
|
Qian Z, Galuska LA, Ma G, McNutt WW, Zhang S, Mei J, Gu X. Backbone flexibility on conjugated polymer's crystallization behavior and thin film mechanical stability. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zhiyuan Qian
- School of Polymer Science and Engineering The University of Southern Mississippi Hattiesburg Mississippi USA
| | - Luke A. Galuska
- School of Polymer Science and Engineering The University of Southern Mississippi Hattiesburg Mississippi USA
| | - Guorong Ma
- School of Polymer Science and Engineering The University of Southern Mississippi Hattiesburg Mississippi USA
| | - William W. McNutt
- Department of Chemistry Purdue University West Lafayette Indiana USA
| | - Song Zhang
- School of Polymer Science and Engineering The University of Southern Mississippi Hattiesburg Mississippi USA
| | - Jianguo Mei
- Department of Chemistry Purdue University West Lafayette Indiana USA
| | - Xiaodan Gu
- School of Polymer Science and Engineering The University of Southern Mississippi Hattiesburg Mississippi USA
| |
Collapse
|
11
|
Androsch R, Toda A, Furushima Y, Schick C. Insertion‐Crystallization‐Induced Low‐Temperature Annealing Peaks in Melt‐Crystallized Poly(
l
‐Lactic Acid). MACROMOL CHEM PHYS 2021. [DOI: 10.1002/macp.202100177] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- René Androsch
- Interdisciplinary Center for Transfer‐oriented Research in Natural Sciences Martin Luther University Halle‐Wittenberg Saale Halle 06099 Germany
| | - Akihiko Toda
- Graduate School of Advanced Science and Engineering Hiroshima University Higashi Hiroshima 739‐8521 Japan
| | - Yoshitomo Furushima
- Materials Characterization Laboratories Toray Research Center Inc. 3–7, Sonoyama 3‐chome Otsu Shiga 520‐8567 Japan
| | - Christoph Schick
- Institute of Physics and Competence Center CALOR University of Rostock Rostock 18051 Germany
- Butlerov Institute of Chemistry Kazan Federal University 18 Kremlyovskaya Street Kazan 420008 Russia
| |
Collapse
|
12
|
Du M, Jariyavidyanont K, Kühnert I, Boldt R, Androsch R. Effect of Molar Mass on Critical Specific Work of Flow for Shear-Induced Crystal Nucleation in Poly (l-Lactic Acid). Polymers (Basel) 2021; 13:1266. [PMID: 33924682 PMCID: PMC8069781 DOI: 10.3390/polym13081266] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/09/2021] [Accepted: 04/11/2021] [Indexed: 11/16/2022] Open
Abstract
The concept of specific work of flow has been applied for the analysis of critical shearing conditions for the formation of crystal nuclei in poly (l-lactic acid) (PLLA). Systematic variation in both time and rate of shearing the melt in a parallel-plate rheometer revealed that these parameters are interconvertible regarding the shear-induced formation of crystal nuclei; that is, low shear rate can be compensated for by increasing the shear time and vice versa. This result supports the view that critical shearing conditions can be expressed by a single quantity, providing additional options for tailoring polymer processing routes when enhanced nuclei formation is desired/unwanted. Analysis of PLLA of different mass-average molar masses of 70, 90, 120, and 576 kDa confirmed improved shear-induced crystal nucleation for materials of higher molar mass, with critical specific works of flow, above which shear-induced nuclei formation occurs, of 550, 60, 25, and 5 kPa, respectively.
Collapse
Affiliation(s)
- Mengxue Du
- Interdisciplinary Center for Transfer-oriented Research in Natural Sciences, Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany;
| | - Katalee Jariyavidyanont
- Interdisciplinary Center for Transfer-oriented Research in Natural Sciences, Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany;
| | - Ines Kühnert
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany; (I.K.); (R.B.)
| | - Regine Boldt
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany; (I.K.); (R.B.)
| | - René Androsch
- Interdisciplinary Center for Transfer-oriented Research in Natural Sciences, Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany;
| |
Collapse
|
13
|
Foglia F, De Meo A, Iozzino V, Volpe V, Pantani R. Isothermal crystallization of
PLA
: Nucleation density and growth rates of
α
and
α
' phases. CAN J CHEM ENG 2020. [DOI: 10.1002/cjce.23818] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Fabiana Foglia
- Department of Industrial EngineeringUniversity of Salerno Fisciano Italy
| | - Annarita De Meo
- Department of Industrial EngineeringUniversity of Salerno Fisciano Italy
| | - Valentina Iozzino
- Department of Industrial EngineeringUniversity of Salerno Fisciano Italy
| | - Valentina Volpe
- Department of Industrial EngineeringUniversity of Salerno Fisciano Italy
| | - Roberto Pantani
- Department of Industrial EngineeringUniversity of Salerno Fisciano Italy
| |
Collapse
|
14
|
Andrianov RA, Androsch R, Zhang R, Mukhametzyanov TA, Abyzov AS, Schmelzer JW, Schick C. Growth and dissolution of crystal nuclei in poly(l-lactic acid) (PLLA) in Tammann's development method. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122453] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
15
|
Hsieh YT, Nozaki S, Kido M, Kamitani K, Kojio K, Takahara A. Crystal polymorphism of polylactide and its composites by X-ray diffraction study. Polym J 2020. [DOI: 10.1038/s41428-020-0343-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
16
|
Androsch R, Zhang R, Schick C. Melt-recrystallization of poly (l-lactic acid) initially containing α′-crystals. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.05.052] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
17
|
Di Lorenzo ML, Androsch R. Influence of α′-/α-crystal polymorphism on properties of poly(l-lactic acid). POLYM INT 2018. [DOI: 10.1002/pi.5707] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
| | - René Androsch
- Interdisciplinary Center for Transfer-oriented Research in Natural Sciences (IWE TFN); Martin Luther University Halle-Wittenberg; Halle/Saale Germany
| |
Collapse
|
18
|
Di Lorenzo ML, Androsch R. Accelerated crystallization of high molar mass poly( l / d -lactic acid) by blending with low molar mass poly( l -lactic acid). Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.01.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
19
|
Equilibrium Melting Temperature of Polymorphic Poly(l-lactide) and Its Supercooling Dependence on Growth Kinetics. Polymers (Basel) 2017; 9:polym9110625. [PMID: 30965929 PMCID: PMC6418859 DOI: 10.3390/polym9110625] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 11/08/2017] [Accepted: 11/14/2017] [Indexed: 11/21/2022] Open
Abstract
In this study, the isothermal crystallization process of poly(l-lactide) (PLLA) has been investigated using in situ XRD, differential scanning calorimetry (DSC), and polarized optical microscopy (POM). Linear and nonlinear extrapolation methods have been deployed to estimate the equilibrium melting temperature (Tm0), which is used for analyzing the supercooling dependence of the PLLA spherulitic growth rate (G). A double-melting behavior observed for PLLA under crystallization Tc < 120 °C has been attributed to the formation of both α′ and α crystals. The Tm0 values of both α′ and α crystals have been evaluated using the linear method (172.8 °C) and nonlinear method (196.4 °C), with the nonlinear estimate being 23.6 °C higher. A discontinuity in the temperature dependence of spherulite growth rate is observed around 128.3 °C. Regime II–III transition is found to occur at 128.3 °C when Tm0 = 196.4 °C as estimated by the nonlinear extrapolation method.
Collapse
|
20
|
|
21
|
|
22
|
|
23
|
Amorphous Fractions of Poly(lactic acid). SYNTHESIS, STRUCTURE AND PROPERTIES OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2016_14] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
24
|
Kinetics of Nucleation and Growth of Crystals of Poly(l-lactic acid). SYNTHESIS, STRUCTURE AND PROPERTIES OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2016_13] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
25
|
|