A wide-angle X-ray scattering study of the ageing of poly(hydroxybutyrate)

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The ageing of poly(hydroxybutyrate) at room temperature has been studied using wide-angle X-ray scattering. The observed unit-cell parameters and crystal density did not change on ageing. A small increase in crystallinity was observed during the first 32 h storage. No change in crystallinity was detectable after this time. These results are discussed in the light of theories relating to the embrittlement of poly(hydroxybutyrate).

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