Kraśkiewicz Agata, Kowalczyk Agnieszka
Department of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, 70-322 Szczecin, Poland.
Materials (Basel). 2022 Dec 16;15(24):8991. doi: 10.3390/ma15248991.
The synthesis of novel phosphorus-containing telomers (P-telomers) was conducted via a solution-free UV-initiated telomerization process of butyl acrylate, methyl methacrylate, 2-hydroxyethyl acrylate, and styrene, different phosphorus telogens (dimethyl phosphite (DMPh), dibutyl phosphite (DBPh), diphenyl phosphite (DPPh) or dibutyl phosphate (DBP)), and a radical photoinitiator-acylphosphine oxide (APO). The course of the UV-phototelomerization process was monitored by photo-DSC and the chemical structures of telomers were assessed by FTIR. Final UV-photocurable varnish compositions consisted of prepared P-telomer syrups, crosslinking monomer (pentaerythritol triacrylate; PETIA), and a radical UV-photoinitiator (α-hydroxyalkylphenone, HAP). The influence of P- telomers on the optical and mechanical features of coatings was investigated. Relatively the highest hardness and satisfactory scratch values, as well as water and solvent resistance, were observed for varnish based on DMPh-telomers. While the strongest adhesive bond to a glass substrate was reported for DPPh-telomers. It is worth pointing out that the P-telomers did not affect the gloss values of varnishes in comparison to the telomer-free reference sample.
通过丙烯酸丁酯、甲基丙烯酸甲酯、丙烯酸-2-羟乙酯和苯乙烯、不同的含磷调聚剂（亚磷酸二甲酯（DMPh）、亚磷酸二丁酯（DBPh）、亚磷酸二苯酯（DPPh）或磷酸二丁酯（DBP））以及自由基光引发剂酰基氧化膦（APO）的无溶剂紫外线引发调聚反应，合成了新型含磷端粒（P-端粒）。通过光差示扫描量热法（photo-DSC）监测紫外线光调聚反应过程，并通过傅里叶变换红外光谱（FTIR）评估端粒的化学结构。最终的紫外线光固化清漆组合物由制备的P-端粒糖浆、交联单体（季戊四醇三丙烯酸酯；PETIA）和自由基紫外线光引发剂（α-羟烷基苯酮，HAP）组成。研究了P-端粒对涂层光学和机械性能的影响。基于DMPh-端粒的清漆观察到相对最高的硬度和令人满意的划痕值，以及耐水和耐溶剂性。而对于DPPh-端粒，报告其与玻璃基材的粘结力最强。值得指出的是，与不含端粒的参考样品相比，P-端粒不会影响清漆的光泽值。
