Study on hydrogenation of partial double bond of styrene series thermoplastic elastomer;

In this paper we have discussed and Compared the π bonds strength and σ bond Strength in carbon-carbon double bond and carbon-carbon triple bond.

When epoxy group is introduced into the double bonds of the main molecular chain, the molecular polarity is enhanced,while the high elongation character remains essentially.

An acetoacetylated polyacrylate and a vinylic groups ended polyurethane were synthesized.

Polysilanes with double bonds were synthesized by the electroreduction of trichloromethylsilane and allyl chloride.

Results shows that higher conjugated double bounds content in PVC resins results in lower initial coloring property,lower whiteness after ageing and lower thermal stabilization;while higher content of isolated double bonds results in lower whiteness;and higher content of iron ions results in high yellow index of PVC resins and its transparent sheet.

The newly formed LCC was originated from condensation between lignin intermediates and xylose,mainly from β-O-4 and 5-5\' lignin structures,which were connected with xylose through benzyl ether linkage.