Methacrylic acid

Urea granules (46.6% of nitrogen and 2.00–4.75 mm in diameter) were provided by Shandong Luxi Fertilizer Co., Ltd. Methyl methacrylate (MMA, AR), n-butyl acrylate (BA, CP), and methacrylic acid (MAA, CP) were obtained from Nanjing Chemical Reagent Co., Ltd. Sodium dodecylbenzenesulfonate (SDBS, AR) was purchased from Chengdu Kelong Chemical Reagent Co., Ltd. Nonyl phenyl polyoxyethylene ether-10 (OP-10, CP) was received from Hebei Xingtai Kewang Auxiliary Agent Co., Ltd. Potassium persulfate (KPS, CP) and hexadecane (HD, CP) were supplied by Sinopharm Chemical Reagent Co., Ltd. All reagents were used as received. Deionized water was used to prepare all emulsions and solutions.

The CW in the form of flakes was purchased from Shanghai Macklin Biochemical Co., Ltd. (Shanghai, China) Methyl methacrylate (MMA, AR), n-butyl acrylate (BA, CP), methacrylic acid (MAA, CP), and urea (AR) were purchased from Nanjing Chemical Reagent Co., Ltd., Nanjing, China. Sodium dodecylbenzene sulfonate (SDBS, AR) was obtained from Chengdu Kelong Chemical Reagent Co., Ltd., Chengdu, China. Potassium persulfate (KPS; Chemical pure) was supplied by Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China) Nonyl phenyl polyoxyethylene ether-10 (OP-10, CP) was obtained from Hebei Xingtai Kewang Auxiliary Agent Co., Ltd., Xingtai, China. The urea granules (46.6 wt.% of nitrogen and 2.00–4.75 mm in diameter) were purchased by Shandong Luxi Fertilizer Co., Ltd., Liaocheng, China.