I am looking for a polymer that softens significantly at this temperature. Although the Tg listed for nylon is around this temperature, I have observed very little softening, so I am looking for a different polymer.
In the list is missing polypropylenecarbonate, the alternating copolymer of propylene oxide and CO2. It is amorphous, has a Tg from 38-44°C (depending on the degree of alternation) and is soluble in MEK or dichloromethane. Small amounts can be bought from SIGMAALDRICH, technical amounts from EMPOWER MATERIALS.
poly-butyl methacrylate has a Tg of about 40 deg C, and readily polymerizes to very high molecular weights, which is essential to subsequent mechanical properties of the resulting polymer.
F. Louis Floyd , the Tg of poly-n-butyl methacrylate is 20 deg C
Plasticized PVC could be made to yield a Tg of 40 degree through a judicious selection of the plasticizer and a trial-and-error method of determining the relative percentages.
Olagoke Olabisi is correct. The Tg of poly-n-butyl methacrylate is 20 deg C.
I failed to mention that there is a family of butyl methacrylates, and that they vary considerably in Tg. Thus, poly-iso-butyl methacrylate is 48 deg C, and tert-butyl methacrylate is 107 deg C. So the original questioner might want to investigate the family of iso-butyl methacrylate.
The suggestion of plasticizing PVC is also a valid one. And this can apply to any higher Tg polymer.
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