The physico-chemical properties of a series of monodispersed alkyl polyoxyethylene ethers were measured. The melting points of the samples increased in a zigzag manner with increasing alkyl chain length at a constant polyoxyethylene chain length, although the melting points of fatty alcohols increased linearly with increasing alkyl chain length.
The refractive index increased with increasing polyoxyethylene chain length and alkyl chain length. The refractive index and hydroxyl value showed a linear relationships. The cloud point increased with increasing polarity (HLB, IOB, OH-V), but the cloud points of shorter alkyl chain samples were higher than those with longer chains at the same polarity.
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