Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites
The non-isothermal crystallization behavior of poly(lactic acid) (PLA)/kenaf fiber (KF) composites was investigated using differential scanning calorimetry (DSC) at different cooling rates (1, 2.5, 5, and 7.5 °C/min) with various KF sizes from 25 to 300 µm. The modified Avrami, Ozawa, and Mo metho...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2020
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| Online Access: | http://journalarticle.ukm.my/15913/ http://journalarticle.ukm.my/15913/1/15.pdf |
| _version_ | 1848813917230333952 |
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| author | Adibah Borhan, Razaina Mat Taib, |
| author_facet | Adibah Borhan, Razaina Mat Taib, |
| author_sort | Adibah Borhan, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | The non-isothermal crystallization behavior of poly(lactic acid) (PLA)/kenaf fiber (KF) composites was investigated
using differential scanning calorimetry (DSC) at different cooling rates (1, 2.5, 5, and 7.5 °C/min) with various KF
sizes from 25 to 300 µm. The modified Avrami, Ozawa, and Mo methods were applied to study the non-isothermal
crystallization kinetics of neat PLA and PLA/KF composites. It was found that KF size of 80-106 µm acts as nucleating
agent during non-isothermal crystallization of PLA/KF composites since the values of half-time of crystallization (t1/2) of
PLA80 were the fastest as compared to neat PLA and other PLA/KF composites at a given cooling rate. The AvramiJeziorny crystallization rate constant (Zc
) increased upon increased of cooling rates for both neat PLA and PLA/KF
composites indicating the improvement in crystallization. However, only the Zc
values for PLA80 were faster than PLA/
KF composites but slower than neat PLA at a certain cooling rate. The Ozawa method did not apply satisfactorily for
both neat PLA and PLA/KF composites. Meanwhile, the results showed that the Mo method can be successfully applied
by providing a good fitting for all cooling rates of neat PLA and PLA/KF composites. The Kissinger activation
energy (ΔE) of PLA80 recorded the lowest value indicating the size of KF between 80-106 µm accelerated the noncrystallization of PLA. |
| first_indexed | 2025-11-15T00:25:48Z |
| format | Article |
| id | oai:generic.eprints.org:15913 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T00:25:48Z |
| publishDate | 2020 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:159132020-12-06T09:22:55Z http://journalarticle.ukm.my/15913/ Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites Adibah Borhan, Razaina Mat Taib, The non-isothermal crystallization behavior of poly(lactic acid) (PLA)/kenaf fiber (KF) composites was investigated using differential scanning calorimetry (DSC) at different cooling rates (1, 2.5, 5, and 7.5 °C/min) with various KF sizes from 25 to 300 µm. The modified Avrami, Ozawa, and Mo methods were applied to study the non-isothermal crystallization kinetics of neat PLA and PLA/KF composites. It was found that KF size of 80-106 µm acts as nucleating agent during non-isothermal crystallization of PLA/KF composites since the values of half-time of crystallization (t1/2) of PLA80 were the fastest as compared to neat PLA and other PLA/KF composites at a given cooling rate. The AvramiJeziorny crystallization rate constant (Zc ) increased upon increased of cooling rates for both neat PLA and PLA/KF composites indicating the improvement in crystallization. However, only the Zc values for PLA80 were faster than PLA/ KF composites but slower than neat PLA at a certain cooling rate. The Ozawa method did not apply satisfactorily for both neat PLA and PLA/KF composites. Meanwhile, the results showed that the Mo method can be successfully applied by providing a good fitting for all cooling rates of neat PLA and PLA/KF composites. The Kissinger activation energy (ΔE) of PLA80 recorded the lowest value indicating the size of KF between 80-106 µm accelerated the noncrystallization of PLA. Penerbit Universiti Kebangsaan Malaysia 2020-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/15913/1/15.pdf Adibah Borhan, and Razaina Mat Taib, (2020) Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites. Sains Malaysiana, 49 (9). pp. 2169-2185. ISSN 0126-6039 http://www.ukm.my/jsm/malay_journals/jilid49bil9_2020/KandunganJilid49Bil9_2020.html |
| spellingShingle | Adibah Borhan, Razaina Mat Taib, Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites |
| title | Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites |
| title_full | Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites |
| title_fullStr | Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites |
| title_full_unstemmed | Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites |
| title_short | Non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites |
| title_sort | non-isothermal crystallization kinetics of poly(lactic acid)/kenaf fiber composites |
| url | http://journalarticle.ukm.my/15913/ http://journalarticle.ukm.my/15913/ http://journalarticle.ukm.my/15913/1/15.pdf |