Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch
<div><p>In this work, the 70/30 and 30/70 w/w polycaprolactone (PCL)/polybutylene succinate (PBS) blends and their corresponding PCL/PBS/(polycarbonate (PC)/multiwalled carbon nanotubes (MWCNTs) masterbatch) nanocomposites were prepared in a twin-screw extruder. The nanocomposites contai...
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2019
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| _version_ | 1864513524007436288 |
|---|---|
| author | Thandi P. Gumede (18112762) |
| author2 | Adriaan S. Luyt (14152341) Agnieszka Tercjak (1854721) Alejandro J. Müller (2723173) |
| author2_role | author author author |
| author_facet | Thandi P. Gumede (18112762) Adriaan S. Luyt (14152341) Agnieszka Tercjak (1854721) Alejandro J. Müller (2723173) |
| author_role | author |
| dc.creator.none.fl_str_mv | Thandi P. Gumede (18112762) Adriaan S. Luyt (14152341) Agnieszka Tercjak (1854721) Alejandro J. Müller (2723173) |
| dc.date.none.fl_str_mv | 2019-04-15T03:00:00Z |
| dc.identifier.none.fl_str_mv | 10.3390/polym11040682 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Isothermal_Crystallization_Kinetics_and_Morphology_of_Double_Crystalline_PCL_PBS_Blends_Mixed_with_a_Polycarbonate_MWCNTs_Masterbatch/25348264 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Engineering Materials engineering PC/MWCNTs masterbatch PCL/PBS blends nanocomposites morphology conductivity isothermal crystallization |
| dc.title.none.fl_str_mv | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <div><p>In this work, the 70/30 and 30/70 w/w polycaprolactone (PCL)/polybutylene succinate (PBS) blends and their corresponding PCL/PBS/(polycarbonate (PC)/multiwalled carbon nanotubes (MWCNTs) masterbatch) nanocomposites were prepared in a twin-screw extruder. The nanocomposites contained 1.0 and 4.0 wt% MWCNTs. The blends showed a sea-island morphology typical of immiscible blends. For the nanocomposites, three phases were formed: (i) The matrix (either PCL- or PBS-rich phase depending on the composition), (ii) dispersed polymer droplets of small size (either PCL- or PBS-rich phase depending on the composition), and (iii) dispersed aggregates of tens of micron sizes identified as PC/MWCNTs masterbatch. Atomic force microscopy (AFM) results showed that although most MWCNTs were located in the PC dispersed phase, some of them migrated to the polymer matrix. This is due to the partial miscibility and intimate contact at the interfaces between blend components. Non-isothermal differential scanning calorimetry (DSC) scans for the PCL/PBS blends showed an increase in the crystallization temperature (Tc) of the PCL-rich phase indicating a nucleation effect caused by the PBS-rich phase. For the nanocomposites, there was a decrease in Tc values. This was attributed to a competition between two effects: (1) The partial miscibility of the PC-rich and the PCL-rich and PBS-rich phases, and (2) the nucleation effect of the MWCNTs. The decrease in Tc values indicated that miscibility was the dominating effect. Isothermal crystallization results showed that the nanocomposites crystallized slower than the neat blends and the homopolymers. The introduction of the masterbatch generally increased the thermal conductivity of the blend nanocomposites and affected the mechanical properties.</p><p> </p></div><h2>Other Information</h2> <p> Published in: Polymers<br> License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/polym11040682" target="_blank">https://dx.doi.org/10.3390/polym11040682</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_d98647646464637de6df7827dafe18da |
| identifier_str_mv | 10.3390/polym11040682 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/25348264 |
| publishDate | 2019 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs MasterbatchThandi P. Gumede (18112762)Adriaan S. Luyt (14152341)Agnieszka Tercjak (1854721)Alejandro J. Müller (2723173)EngineeringMaterials engineeringPC/MWCNTs masterbatchPCL/PBS blendsnanocompositesmorphologyconductivityisothermal crystallization<div><p>In this work, the 70/30 and 30/70 w/w polycaprolactone (PCL)/polybutylene succinate (PBS) blends and their corresponding PCL/PBS/(polycarbonate (PC)/multiwalled carbon nanotubes (MWCNTs) masterbatch) nanocomposites were prepared in a twin-screw extruder. The nanocomposites contained 1.0 and 4.0 wt% MWCNTs. The blends showed a sea-island morphology typical of immiscible blends. For the nanocomposites, three phases were formed: (i) The matrix (either PCL- or PBS-rich phase depending on the composition), (ii) dispersed polymer droplets of small size (either PCL- or PBS-rich phase depending on the composition), and (iii) dispersed aggregates of tens of micron sizes identified as PC/MWCNTs masterbatch. Atomic force microscopy (AFM) results showed that although most MWCNTs were located in the PC dispersed phase, some of them migrated to the polymer matrix. This is due to the partial miscibility and intimate contact at the interfaces between blend components. Non-isothermal differential scanning calorimetry (DSC) scans for the PCL/PBS blends showed an increase in the crystallization temperature (Tc) of the PCL-rich phase indicating a nucleation effect caused by the PBS-rich phase. For the nanocomposites, there was a decrease in Tc values. This was attributed to a competition between two effects: (1) The partial miscibility of the PC-rich and the PCL-rich and PBS-rich phases, and (2) the nucleation effect of the MWCNTs. The decrease in Tc values indicated that miscibility was the dominating effect. Isothermal crystallization results showed that the nanocomposites crystallized slower than the neat blends and the homopolymers. The introduction of the masterbatch generally increased the thermal conductivity of the blend nanocomposites and affected the mechanical properties.</p><p> </p></div><h2>Other Information</h2> <p> Published in: Polymers<br> License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.3390/polym11040682" target="_blank">https://dx.doi.org/10.3390/polym11040682</a></p>2019-04-15T03:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.3390/polym11040682https://figshare.com/articles/journal_contribution/Isothermal_Crystallization_Kinetics_and_Morphology_of_Double_Crystalline_PCL_PBS_Blends_Mixed_with_a_Polycarbonate_MWCNTs_Masterbatch/25348264CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/253482642019-04-15T03:00:00Z |
| spellingShingle | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch Thandi P. Gumede (18112762) Engineering Materials engineering PC/MWCNTs masterbatch PCL/PBS blends nanocomposites morphology conductivity isothermal crystallization |
| status_str | publishedVersion |
| title | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch |
| title_full | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch |
| title_fullStr | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch |
| title_full_unstemmed | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch |
| title_short | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch |
| title_sort | Isothermal Crystallization Kinetics and Morphology of Double Crystalline PCL/PBS Blends Mixed with a Polycarbonate/MWCNTs Masterbatch |
| topic | Engineering Materials engineering PC/MWCNTs masterbatch PCL/PBS blends nanocomposites morphology conductivity isothermal crystallization |