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Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han

Blends of poly(ethylene oxide) (PEO) with an amorphous random copolymer, polyacrylate (PA), were prepared via solution casting. Thermal properties of the blends were investigated by differential scanning calorimetry (DSC). The existence of two glass transition temperatures (Tg) over the entire compo...

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Main Authors: Sim, Lai Har, Chan, Chin Han
Format: Research Reports
Language:English
Published: 2006
Subjects:
Salts
Extraction (Chemistry)
Polyethylene
Online Access:https://ir.uitm.edu.my/id/eprint/48950/1/48950.pdf
https://ir.uitm.edu.my/id/eprint/48950/
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spelling my.uitm.ir.489502023-01-12T07:07:22Z https://ir.uitm.edu.my/id/eprint/48950/ Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han Sim, Lai Har Chan, Chin Han Salts Extraction (Chemistry) Polyethylene Blends of poly(ethylene oxide) (PEO) with an amorphous random copolymer, polyacrylate (PA), were prepared via solution casting. Thermal properties of the blends were investigated by differential scanning calorimetry (DSC). The existence of two glass transition temperatures (Tg) over the entire composition range of the blends suggests that the blends are heterogeneous on a macroscopic scale. Equilibrium melting temperature (Tm°) of PA/PEO blends were determined after the Hoffman- Weeks method. No systematic variation of I'm0 is detected for the blends of PA/PEO after isothermal crystallization. These results clearly show that PA/PEO blends are not miscible in the melt. Isothermal crystallization kinetics of PEO in the blends were analysed by the Avrami equation at crystallization temperature (Tc) ranging between 33 and 49 °C. The overall rate constant of isothermal crystallization (KAVU) of PEO decreases exponentially with ascending PA content. The Avrami exponent (n), determined for neat PEO and its blends at all Tcs, lie between 1.98 and 3.00, suggesting a two or three-dimensional diffusion-controlled crystal growth of PEO. 2006 Research Reports NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/48950/1/48950.pdf Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han. (2006) [Research Reports] (Unpublished)
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic Salts
Extraction (Chemistry)
Polyethylene
spellingShingle Salts
Extraction (Chemistry)
Polyethylene
Sim, Lai Har
Chan, Chin Han
Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han
description Blends of poly(ethylene oxide) (PEO) with an amorphous random copolymer, polyacrylate (PA), were prepared via solution casting. Thermal properties of the blends were investigated by differential scanning calorimetry (DSC). The existence of two glass transition temperatures (Tg) over the entire composition range of the blends suggests that the blends are heterogeneous on a macroscopic scale. Equilibrium melting temperature (Tm°) of PA/PEO blends were determined after the Hoffman- Weeks method. No systematic variation of I'm0 is detected for the blends of PA/PEO after isothermal crystallization. These results clearly show that PA/PEO blends are not miscible in the melt. Isothermal crystallization kinetics of PEO in the blends were analysed by the Avrami equation at crystallization temperature (Tc) ranging between 33 and 49 °C. The overall rate constant of isothermal crystallization (KAVU) of PEO decreases exponentially with ascending PA content. The Avrami exponent (n), determined for neat PEO and its blends at all Tcs, lie between 1.98 and 3.00, suggesting a two or three-dimensional diffusion-controlled crystal growth of PEO.
format Research Reports
author Sim, Lai Har
Chan, Chin Han
author_facet Sim, Lai Har
Chan, Chin Han
author_sort Sim, Lai Har
title Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han
title_short Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han
title_full Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han
title_fullStr Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han
title_full_unstemmed Crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / Sim Lai Har and Chan Chin Han
title_sort crystallization and melting behaviour of polymer blends comprising polyacrylate and poly(ethylene oxide) / sim lai har and chan chin han
publishDate 2006
url https://ir.uitm.edu.my/id/eprint/48950/1/48950.pdf
https://ir.uitm.edu.my/id/eprint/48950/
_version_ 1755876001307426816
score 13.211869

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