Citation: . ENHANCEMENT OF DAMPING PERFORMANCE OF POLYMERS BY FUNCTIONAL SMALL MOLECULES[J]. Chinese Journal of Polymer Science, ;2002, 20(2): 119-127. shu

ENHANCEMENT OF DAMPING PERFORMANCE OF POLYMERS BY FUNCTIONAL SMALL MOLECULES

Received Date: 2 July 2001
Revised Date: 3 September 2001

The addition effects of organic small molecular substances N,N'-dicyclohexyl-benzothiazyl-2-sulfenamide(DZ)and 3,9-bis{1,1-dimethyl-2[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]ethyl}-2,4, 8, 10-tetraoxaspiro [5,5]-un-decane (AO-80) on the dynamic mechanical properties of chlorinated polyethylene (CPE), chlorinated polypropylene (CPP),acrylate rubber (ACM) and their blends were investigated. In the case of compatible systems such as CPE/DZ and ACM/AO-80, the height of the loss tangent(tanδ)peak of a matrix polymer (CPE or ACM) increases,and its peak position shifts to a higher temperature with the addition of DZ or AO-80.By contrast,for incompatible CPE/AO-80,a novel transition appeared above the glass transition temperature of CPE.This additional transition was assigned to dissociation of the intermolecular hydrogen bond between the α-hydrogen of CPE and the hydroxyl groups of AO-80 within the AO-80-rich domain.This will provide a new concept for developing damping material.However,the minimum value between two tan δ peaks is lower.It was found that the temperature dependence of tan δcould be improved by adding chlorinated paraffin (CP) or ACM to CPE/AO-80.In addition,another termary system of ACM/CPP with more AO-80 was found to be a very good self-adhesive damping material because of the appearance of a novel transition due to an interfacial layer of ACM/CPP.
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