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Title

蓖麻油交联改性对室温自愈合聚氨酯性能的影响.

Authors

莫汉豪; 唐亚丽; 卢立新; 丘晓琳; 王 军

Abstract

A series of self-healing polyurethane elastomers (PU) were synthesized using different amounts of castor oil (CTO) or trimethylolpropane (TMP) as cross-linking reagents. The effects of the amount of cross-linking reagent on the mechanical properties and self-healing properties of PU were investigated by an electronic tensile tester. The results showed that both CTO and TMP could increase the tensile strength of self-healed PU, but the elongation at break was decreased. Meanwhile, the self-healing properties of the elastomer were reduced. With an identical molar ratio of crosslinking reagent, the self-healing property of PU crosslinked by CTO was found to be superior to that crosslinked by TMP. The self-healing capacity of PU could only be maintained while a small amount of TMP was added. With the increase of CTO addition, the tensile strength of self-healed PU increased first and then decreased. When the molar ratio of polypropylene glycol (PPG) to CTO was 7∶3, the optimal overall performances were obtained, the tensile strength was recovered to 80.95% of the original level after self-healing.

Subjects

CASTOR oil; TENSILE strength; POLYPROPYLENE oxide; POLYURETHANE elastomers; ELASTOMERS; MOLARS

Publication

Journal of Functional Polymers, 2019, Vol 32, Issue 4, p501

ISSN

1008-9357

Publication type

Academic Journal

DOI

10.14133/j.cnki.1008-9357.20180912001