Polysiloxane is a promising modified material due to its good hydrophobicity and toughness, but it suffers from serious uneven distribution and migration during film formation process which gradually lead to the destruction of the hydrophobic structure. A novel silicon-modified copolymer with different molecular weight and vinyl content was synthesized to overcome this problem: an appropriate amount of double bonds between the polysiloxane backbone ensures uniform distribution. Moreover, a multicrosslinked network binder was prepared by miniemulsion polymerization of the polyacrylate copolymers and polysiloxane. Unlike the common crosslinked network of an uneven distribution and migration of silicone backbone, the polysiloxane with suitable crosslinking degree and molecular weight could be effectively distributed evenly during the film formation process. As a result, a better hydrophobicity and toughness performance (89.7° ± 0.5°, 2500% elongation at break) was achieved with this novel poly(methylvinylsiloxane) with 11,024 g/mol at 0.804 mmol/g vinyl content. The product was applied to pigment printing with better wet rubbing fastness and soft handle compared with the unmodified polyacrylates binder. The DSC, SAXS, and XPS indicated that high molecular organosilicon chain and moderate vinyl content were prone to phase separation and obviously shifted onto the surface of film, enriching a uniform organosilicon layer, which played a vital role in the surface hydrophobicity and mechanical properties.

中文翻译：

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乙烯基聚硅氧烷对聚丙烯酸酯薄膜性能的影响及其在颜料印刷中的应用

聚硅氧烷由于其良好的疏水性和韧性而成为有前途的改性材料，但是在成膜过程中会遭受严重的不均匀分布和迁移，从而逐渐导致疏水结构的破坏。为了克服这个问题，合成了一种具有不同分子量和乙烯基含量的新型硅改性共聚物：聚硅氧烷主链之间适量的双键可确保均匀分布。此外，通过聚丙烯酸酯共聚物和聚硅氧烷的细乳液聚合制备多交联的网络粘合剂。与常见的有机硅骨架分布和迁移不均匀的交联网络不同，具有合适的交联度和分子量的聚硅氧烷可以在成膜过程中有效地均匀分布。结果，使用这种新型的（甲基乙烯基硅氧烷）在乙烯基含量为0.804mmol / g时具有更好的疏水性和韧性性能（89.7°±0.5°，断裂伸长率2500％）。与未改性的聚丙烯酸酯粘合剂相比，该产品可用于颜料印刷，具有更好的湿摩擦牢度和柔软手感。DSC，SAXS和XPS表明，高分子有机硅链和适中的乙烯基含量易于相分离，并明显转移到薄膜表面，从而富集了均匀的有机硅层，这对表面疏水性和机械性能起着至关重要的作用。使用乙烯基含量为0.804 mmol / g的11,024 g / mol的新型聚（甲基乙烯基硅氧烷），可以获得更好的疏水性和韧性（89.7°±0.5°，断裂伸长率2500％）。与未改性的聚丙烯酸酯粘合剂相比，该产品可用于颜料印刷，具有更好的湿摩擦牢度和柔软手感。DSC，SAXS和XPS表明，高分子有机硅链和适中的乙烯基含量易于相分离，并明显转移到薄膜表面，从而富集了均匀的有机硅层，这对表面疏水性和机械性能起着至关重要的作用。使用乙烯基含量为0.804 mmol / g的11,024 g / mol的新型聚（甲基乙烯基硅氧烷），可以获得更好的疏水性和韧性性能（89.7°±0.5°，断裂伸长率2500％）。与未改性的聚丙烯酸酯粘合剂相比，该产品可用于颜料印刷，具有更好的湿摩擦牢度和柔软手感。DSC，SAXS和XPS表明，高分子有机硅链和适中的乙烯基含量易于相分离，并明显转移到薄膜表面，从而富集了均匀的有机硅层，这对表面疏水性和机械性能起着至关重要的作用。与未改性的聚丙烯酸酯粘合剂相比，该产品可用于颜料印刷，具有更好的湿摩擦牢度和柔软手感。DSC，SAXS和XPS表明，高分子有机硅链和适中的乙烯基含量易于相分离，并明显转移到薄膜表面，从而富集了均匀的有机硅层，这对表面疏水性和机械性能起着至关重要的作用。与未改性的聚丙烯酸酯粘合剂相比，该产品可用于颜料印刷，具有更好的湿摩擦牢度和柔软手感。DSC，SAXS和XPS表明，高分子有机硅链和适中的乙烯基含量易于相分离，并明显转移到薄膜表面，从而富集了均匀的有机硅层，这对表面疏水性和机械性能起着至关重要的作用。