Table 1 Molecular weights, thermal properties and water contact angles of P(PDCm).

From: Effects of alkylene spacer length of 2-pyrone-4,6-dicarboxylic acid polyesters on biodegradability and metal adhesive properties

 

Mna

Mwa

Mw/Mna

Td5 (°C)b

Tg (°C)c

water contact angles (°)

P(PDC2)

4600

14500

3.15

290.1

96.2

60

P(PDC3)

6200

20500

3.31

282.0

93.4

68

P(PDC4)

4100

7100

1.73

271.9

78.9

77

P(PDC6)

5500

12500

2.27

300.5

49.5

104

P(PDC8)

–

–

–

298.0

44.1

–

P(PDC12)

–

–

–

308.5

43.6

–

  1. aMolecular weights estimated from GPC using DMF as the eluent.
  2. bTemperature at which 5% weight loss occurred.
  3. cGlass transition temperatures determined by the second heating scan of DSC curves.
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