Abstract PVA acetalization by 10-undecenal was carried out in aqueous medium in order to obtain PVA with acetalization degree (AD) ranging from 0.36 up to 1.85 mol%. PVA chain organization in 8 wt% aqueous solutions was investigated through Small Angle X-ray Scattering measurements. The significant modification of macromolecules organization evidenced at the AD value of 0.6 mol% was explained by reinforced polymer-polymer interactions as a consequence of hydrophobic grafts on the polymer chains. Newtonian viscosity of acetalized PVA solutions was also significantly increased for AD above 0.6 mol%. A chemical labeling method was developed to prove the presence of grafted segments at the surface of the films prepared from modified PVAs. The concentration of grafted moieties at the surface increased significantly above 0.8–0.9 mol% AD and attained a value of 27 µmol m−2 for an AD value of 1.48 mol%.

中文翻译：

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10-十一烯PVA缩醛化对大分子组织和水溶液粘度的影响。改性 PVA 薄膜的表面和体积特性

摘要 为了获得缩醛化度（AD）为0.36~1.85 mol%的PVA，在水性介质中进行10-十一烯醛的PVA缩醛化反应。通过小角 X 射线散射测量研究了 8 wt% 水溶液中的 PVA 链组织。AD 值为 0.6 mol% 时所证明的大分子组织的显着改性可以通过聚合物链上疏水接枝导致的聚合物-聚合物相互作用增强来解释。AD 超过 0.6 mol% 时，缩醛化 PVA 溶液的牛顿粘度也显着增加。开发了一种化学标记方法来证明在由改性 PVA 制备的薄膜表面存在接枝链段。表面接枝部分的浓度显着增加到 0.8-0 以上。