Shape Memory Polyurethane Based On Palm Oil Polyol
In this study, shape memory polyurethane (SMPU) was prepared based on palm oil polyol (POP) to reduce the usage of petrochemical based polyol. The amount of POP used was up to 20% and the total reaction time for prepolymer preparation was 2.5 to 5 hours. POP based SMPU was prepared via two-step p...
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| Main Author: | |
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| Format: | Monograph |
| Language: | English |
| Published: |
Universiti Sains Malaysia
2015
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| Subjects: | |
| Online Access: | http://eprints.usm.my/52865/1/Shape%20Memory%20Polyurethane%20Based%20On%20Palm%20Oil%20Polyol_Tuan%20Nur%20Izzah%20Tuan%20Ab%20Rashid_B1_2015.pdf http://eprints.usm.my/52865/ |
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| Summary: | In this study, shape memory polyurethane (SMPU) was prepared based on palm
oil polyol (POP) to reduce the usage of petrochemical based polyol. The amount of
POP used was up to 20% and the total reaction time for prepolymer preparation was 2.5
to 5 hours. POP based SMPU was prepared via two-step polymerization process. The
effect of POP addition and reaction time of POP were investigated using thermal
analysis, mechanical and shape memory properties. The crystallinity of SMPU
decreased with addition of POP due to the formation of hard segments that restrict the
crystallization of PCL crystals. However, the presence of crystalline structure was still
sufficient to exhibit excellent shape fixity up to 20% molar ratio of POP content. Even
though the shape recovery does not achieved 100% recovery, it can be classified as a
good recovery because it was recovered almost to 100%. It was also found that the
mechanical properties were changed with addition of more POP content and that the
maximum values were obtained at 10% molar ratio POP based SMPU. The mechanical
properties based on reaction time also showed maximum value at 4.5 hours for both
10% and 20% molar ratio of POP. Meanwhile, the reaction time at 4.5 hours showed
minimum value of crystallinity for both molar ratios. Based on this study, the SMPU
based on 10% POP showed improved thermal, mechanical and shape memory
properties compared to pure SMPU. The reaction time at 4.5 hours also showed an
excellent result toward the thermal, mechanical and shape memory properties. |
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