Investigation on the Effect of Butyl Acrylate (nBA) to Improve the Toughness Properties of Methacrylate-Based Waterproofing Adhesive Material (MMA) for the Steel Bridge Deck

Table 3

Polymer decomposition results with temperature.

Sample	First decomposition		Second decomposition		Third decomposition		Final decomposition
	T5 (°C)	Weight loss (wt%)	T10 (°C)	Weight loss (wt%)	T50 (°C)	Weight loss (wt%)	Tf (°C)	Weight loss (wt%)
MMA	264.1	5.00	302.1	10.26	376.1	50.05	398.0	65.78
70/30 poly(MMA-r-nba)	237.6	5.09	321.6	10.13	393.0	50.75	428.0	72.59
50/50 poly(MMA-r-nba)	289.9	5.07	333.9	10.35	393.9	49.72	428.0	61.90
40/60 poly(MMA-r-nba)	261.0	5.06	319.0	10.16	387.0	49.35	428.0	75.72

Note：T5, T10, T50 is the temperature of 5%, 10%, 50% of weight loss, respectively；Tf is the final stage temperature.