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wanglin59081金虫 (小有名气)
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[求助]
求翻译
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Unfractionated synthetic trans-l,4-polyisoprene (Poly- sciences Inc.) was crystallized from 1% amyl acetate solution by precipitation at 0°C and slow heating in the crystallization liquid to 30°C, yielding stacks of curved semicrystalline lamellae with the crystalline portions in the fl-form. Semicrystalline samples with the crystalline component in the a-form were obtained from the same material by cooling a 1% amyl acetate solution directly to 30°C. All samples were washed with fresh amyl acetate and mats formed by filtration using Teflon filters followed by drying at room temperature. |
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