Table 1 Sample preparation of cross-linked polybutadienes with different polyCys contentsa

From: Cross-linking polybutadiene rubber via a thiol-ene reaction with polycysteine as a degradable cross-linker

Run

Sample

[SH]/[vinyl]b

Time (h)

Gelationc

Yield (%)

1

CL-PB2.5

0.02

2

+

95

2

CL-PB1.25

0.01

2

+

92

3

CL-PB0.625

0.005

2

+

72

4

CL-PB0

0

2

−

0

5

CL-PB0

0

4

+

74

  1. aReaction was performed in pyridine at 80 °C
  2. bThe molar ratio of thiol groups of polyCys to vinyl groups of polybutadiene
  3. cThe formation of insoluble gel was confirmed after washing with chloroform and methanol
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