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Sains Malaysiana 39(5)(2010): 769–774
Effect of Phosphite Loading on
the Mechanical and Fire Properties of Palm-Based Polyurethane
(Kesan
Penambahan Fosfit ke Atas Sifat Mekanik dan Pembakaran Poliuretana Asas Sawit)
Khairiah Haji Badri* & Amamer Musbah Redwan
School of Chemical Sciences
and Food Technology
Faculty of Science and
Technology
Universiti Kebangsaan Malaysia
43600 UKM Bangi, Selangor D.E., Malaysia
Diserahkan: 14 April 2009 / Diterima:
18 Ogos 2009
ABSTRACT
Fire-retarding
polyurethane (PU) composite
was produced by adding 2,4-ditert-butylphenyl phosphite (FR) to palm-based monoester resin with loading percentage of 0, 2,
4, and 6 wt%. The Shore D hardness index increased marginally with increasing FR content. However, the impact and flexural strengths decreased
with increasing FR loading
attributed to the weak interfacial bonding between FR and PU matrix. The
fire test indicated lowering of burning rate (from 5.30 mm s-1 to 2.80 mm s-1) as the loading percentage of FR increased. The combustion enthalpy of the composites also
decreased with higher loading percentage of FR.
Keywords:
Burning rate; fire-retarding; palm-based polyurethane; phosphite
ABSTRAK
Komposit
poliuretana (PU)
berperencat api telah dihasilkan dengan menambahkan 2,4- ditertbutilfenil
fosfit (FR) ke dalam resin monoester
asas sawit dengan penambahan 0, 2, 4 dan 6 % bt. Indeks kekerasan Shore D
meningkat dengan peningkatan komposisi FR. Walau bagaimanapun, kekuatan hentaman dan fleksuralnya menurun
dengan penambahan FR akibat
terhasilnya lekatan antaramuka yang lemah antara FR dan matrik PU.
Ujian pembakaran menunjukkan kadar pembakaran menurun (daripada 5.30 mm s-1 ke 2.80 mm s-1) apabila penambahan FR ditingkatkan. Entalpi pembakaran komposit ini menurun dengan
peratusan FR yang tinggi.
Kata kunci:
Fosfit; kadar pembakaran; perencat api; poliuretana asas sawit
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*Pengarang untuk surat-menyurat;
email: kaybadri@ukm.my
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