We develop theories and perform molecular dynamics simulations to understand the elasticity of polymers - from the single chain level to the level of networks (elastomers an gels). This includes, among others:

• How tension is transmitted from the chain level down to the level of chemical bonds.

• Elucidating the strain stiffening of flexible quasi-ideal chains. 

• The mechanical properties of biopolymer networks. 

• Quantifying the effect of elastic defect in molecular networks.