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Journal of Applied Sciences

Year: 2002 | Volume: 2 | Issue: 3 | Page No.: 400-404
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Research Article

Differential Scanning Calorimetric Studies of Poly (Methyl Methacrylate Co-Styrene (MMA-Co-ST) Copolymers

S. Hamdan
Department of Physics, University Putra Malaysia, Serdang 43400 Selangor, Malaysia
D.ZM.A. Hashim
Department of Physics, University Putra Malaysia, Serdang 43400 Selangor, Malaysia
M. B. Ahmad
Department of Chemistry University Putra Malaysia, Serdang 43400 Selangor, Malaysia
W.F.W. Abdullah
Department of Physics, University Putra Malaysia, Serdang 43400 Selangor, Malaysia

ABSTRACT

Copolymers of methyl methacrylate (MMA) and styrene (ST) at different ratios (1:1, 2:1, and 1:2) were prepared with various percentage of ethylene glycol dimethacrylate (EGDMA) as cross-linking agent. The percentage of cold crystallization was estimated on the basis of exothermal energy. Copolymers with higher ratios of MMA produce higher percentage of crystallization, but surpassingly yield lower melting temperature. Although the percentage of crystallization increases with EGDMA content, the melting temperature decreases with higher content of EGDMA.
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REFERENCES

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