Synthesis and characterization of fluorinated polyacrylate latex emulsified with novel surfactants

Figures & data

Table 1. Basic recipe of preparing emulsion.

Ingredients	Amount/g	Ingredients	Amount/g
MMA	13.95	OP-10	0.6
BA	13.95	SLG	0.6
HFMA	2.1	De-ionized water	70
KPS	0.18

Figure 1. FTIR of film.

Figure 2. DSC analysis of film.

Table 2. Effect of amount of emulsifiers on average particle size of latex.

Amount of emulsifier/%	d/nm	PDI
2.0	305.2	0.091
3.0	197.9	0.035
4.0	101.4	0.064
5.0	85.31	0.120
6.0	77.12	0.095
7.0	72.18	0.112
8.0	66.37	0.130

Table 3. Influence of mass ratio of monomer on properties of latex.

Mass ratio of MMA to BA	2:1	1.5:1	1:1	1.5:1	1:2
Conversion percentage/%	99.73	99.98	98.01	99.03	99.26
Coagulation percentage/%	0.39	0.37	0.16	0.19	0.29
Appearance of film	Hard and brittle	Hard	Moderate	Soft	Sticky
Appearance of latex	●	●	●	●	●
Mechanical stability	√	√	√	√	√

Notes: ● stands for appearance of the emulsion is translucent with blue light.

√ stands for emulsion is stability.

Figure 3. Effect of mass ratio of monomer on appearance of film (a) m(MMA):m(BA)=2:1; (b) m(MMA):m(BA)=1.5:1; (c) m(MMA):m(BA)=1:1; (d) m(MMA):m(BA)=1:1.5; (e) m(MMA):m(BA)=1:2.

Table 4. Influence of amount of emulsifier and its mass ratio on properties of emulsion.

Amount of emulsifier/%	Mass ratio of SLG to OP-10	Conversion percentage/%	Coagulation percentage/%	Appearance of latex	Mechanical stability	Ca^2+ stability
2.0	1.0:1.0	94.02	1.39	▲	√	√
3.0	1.5:1.5	95.47	1.17	▲	√	√
4.0	2.0:2.0	96.56	0.91	●	√	√
5.0	2.5:2.5	98.00	0.67	●	√	■
6.0	3.0:3.0	97.36	0.71	●	√	■
7.0	3.5:3.5	97.01	0.60	●	√	■
8.0	4.0:4.0	96.75	0.87	●	√	■

Notes: ▲ means that the appearance of the latex is milky white.

● means that the appearance of the latex is translucent with blue light.

√ stands for the good stability of latex.

■ stands for the poor stability of latex.

Figure 4. Influence of amount of initiator on conversion percentage (a) coagulum; (b) percentage.

Figure 5. TGA of film (a) acrylate copolymer; (b) acrylate copolymer modified by fluorine monomer.

Figure 6. Influence of amount of HFMA on water absorption of film.

Figure 7. Influence of amount of HFMA on CA.

Scheme 1. Synthetic pathway of preparing fluorinated polyacrylate latex.