Partially fluorinated polyolefins are widely utilized due to their outstanding properties, including low surface energy, high thermal stability, and high chemical stability. In this contribution, we report the design and synthesis of a series of fluorinated mono and disubstituted norbornene-based comonomers, and investigate their copolymerization with ethylene to produce partially fluorinated polyolefins using phosphine–sulfonate palladium catalysts. These fluorinated norbornene-based comonomers lead to remarkable catalytic activities (up to 5.7 × 10⁶ g mol⁻¹ h⁻¹), high molecular weights (up to 358 kg mol⁻¹), high comonomer incorporation ratios (up to 28.9 mol%) and high fluorine contents (up to 52.0 wt%). Compared to previously reported studies, this work demonstrates superior comprehensive performances in terms of various copolymerization parameters. More importantly, these fluorinated norbornene-based comonomers can impart widely tunable thermal, mechanical, surface, and optical properties to the resulting partially fluorinated polyolefins.

中文翻译：

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通过乙烯与氟化降冰片烯基共聚单体共聚合成部分氟化聚烯烃

部分氟化聚烯烃因其优异的性能而被广泛应用，包括低表面能、高热稳定性和高化学稳定性。在这篇文章中，我们报告了一系列氟化单和二取代降冰片烯基共聚单体的设计和合成，并研究了它们与乙烯的共聚，使用膦磺酸钯催化剂生产部分氟化聚烯烃。这些氟化降冰片烯基共聚单体具有显着的催化活性（高达 5.7 × 10 ⁶ g mol ^-1 h ^-1）、高分子量（高达 358 kg mol ^-1）、高共聚单体掺入率（高达 28.9 mol%） ）和高氟含量（高达 52.0 wt%）。与之前报道的研究相比，这项工作在各种共聚参数方面表现出了优异的综合性能。更重要的是，这些氟化降冰片烯基共聚单体可以赋予所得的部分氟化聚烯烃广泛可调的热、机械、表面和光学性能。