YANG Dongjie, SHI Yiming, SHAN Guorong. Effect of acrylate amount on properties of swelling-block waterborne polyurethane[J]. CIESC Journal, 2018, (11): 4856-4861.
YANG Dongjie, SHI Yiming, SHAN Guorong. Effect of acrylate amount on properties of swelling-block waterborne polyurethane[J]. CIESC Journal, 2018, (11): 4856-4861.DOI: 10.11949/j.issn.0438-1157.20180481.
Hydroxyl-terminated polyacrylate (PA-OH) was synthesized by free radical copolymerization of methyl methacrylate (MMA) and n-butyl acrylate (BA) using mercaptoethanol as chain transfer. PA-OH was blocked with waterborne polyurethane (WPU) by block polymerization
and then prepared polyacrylate block waterborne polyurethane emulsion (WPUA) by prepolymer dispersion. A series of polyacrylate swelling-block waterborne polyurethane composite emulsions with MMA/BA as the monomer were prepared by emulsion polymerization. The results showed that the dosage of acrylates in WPUA-PA can reach 240% of WPUA. WPUA-PA has the best performance when the dosage of acrylates is 120% of WPUA. The average emulsion particle size is 68 nm