Add time:08/20/2019 Source:sciencedirect.com
The temperature rise during polymerization of the resins Lowicryl K4M, K11M, HM20, and HM23 by uv light was studied. Polymerization was performed in 1.7-ml (in a few experiments 0.7-ml) polyethene tubes equipped with a lid. The temperature rise was considerable at room temperature and at 5°C when the tubes were kept in air, but slight (2–4°C) when they were immersed in a water bath. At −35°C and below, the temprature rise was less than 2°C in samples that were surrounded by air during the polymerization. When such samples were allowed to warm up to 20°C a small, transient rise (about 5°C) of the resin temperature above ambient occurred.
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