Non-silicone release agents with surface-protecting functions are highly desirable in various industrial applications such as electronics and packaging. In this study, a series of comb-like polyvinyl n-octadecyl carbamate (PVODC) with different structures were synthesized using polyvinyl alcohol (PVA) grafted with octadecyl isocyanate (ODI). The effects of the alcoholysis degree (DA), polymerization degree (DP), and substitution degrees (DS) of alkyl side chains of PVA precursor on the structure-property correlation of PVODCs were explored by using various techniques. Results indicated that at a low DS of ∼40 mol%, decreasing the DA of PVA led to lower melting points and thermal stability but enhanced the release performance of PVODCs. However, the crystal form and chain stacking behavior of PVODCs appear unaffected by the DA. The effect of DA was less significant at a high DS of ∼68 mol%. Within the DP range studied, the DP of PVA had little effect on the structure and properties of PVODCs. Only when the DP of PVA surpassed 1700, the thermal stability was enhanced due to stronger molecular interactions, but at a cost of deteriorated solubility and film-forming performance.

具有表面保护功能的非有机硅脱模剂在电子和包装等各种工业应用中非常受欢迎。本研究以十八烷基异氰酸酯（ODI）接枝聚乙烯醇（PVA）为原料，合成了一系列不同结构的梳状聚乙烯醇十八烷基氨基甲酸酯（PVODC）。采用多种技术探讨了PVA前驱体烷基侧链的醇解度（DA）、聚合度（DP）和取代度（DS）对PVODCs结构-性能相关性的影响。结果表明，在~40 mol% 的低 DS 下，降低 PVA 的 DA 会导致熔点和热稳定性降低，但会增强 PVODC 的释放性能。但是，那PVODC 的晶型和链堆积行为似乎不受 DA 的影响。当 DS 高达 ∼68 mol% 时，DA 的影响不太显着。在研究的DP范围内，PVA的DP对PVODCs的结构和性能影响不大。只有当PVA的DP超过1700时，由于分子相互作用更强，热稳定性得到增强，但代价是溶解度和成膜性能恶化。