Long-chain polyacetals from plant oils

摘要

Plant oil-derived α,ω-diacetals are polycondensated to the novel polyacetals OCH _2O(CH _2) _y_n (y = 19 and 23) with molecular weight of ca. M _n = 2 × 10 ~4 g mol ~(-1). The long methylene sequences provide substantial melt and crystallization temperatures (T _m = 88 °C and T _c = 68 °C for y = 23), and rates of hydrolytic degradation are dramatically lower for the long-chain polyacetals versus a shorter chain analogue (y = 12) studied for comparison.