Preparation and photocrosslinking behaviors of polyesters derived from trans‐2,2′‐dihydroxystilbene

Yun Chen, Cherng‐Jing ‐J Tsay

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

The monomer, trans‐2,2′‐dihydroxystilbene (DHS), has been prepared by asymmetric photocleavage (254 nm) of coumarin dimer acid derived from coumarin dimer. Four new polyesters are successfully synthesized by interfacial polycondensation of the DHS with adipoyl chloride, azelaoyl chloride, sebacoyl chloride, and dodecanedioyl dichloride, respectively. The reduced viscosities of the polyesters decrease from 0.32 to 0.11 dL/g as the number of methylene unit in diacid chlorides increases from 4 to 10. From DSC investigation, it is found that the polyesters are semi‐crystalline polymers with Tm = 39–192°C. Under 350 nm light, photocrosslinking behavior in solution and film‐state is investigated by UV spectral change with irradiation time (350 nm). The photoreactive stilbene chromophores in the main chain dimerize to form cyclobutane derivatives, and lead to crosslinking of the polyesters. Photosensitivity in the film state has also been evaluated by their characteristic curves. Polyester from dodecanedioyl dichloride (5d) exhibits the highest initial reaction rate and ultimate crosslinking ratio. © 1995 John Wiley & Sons, Inc.

原文English
頁(從 - 到)1319-1327
頁數9
期刊Journal of Polymer Science Part A: Polymer Chemistry
33
發行號8
DOIs
出版狀態Published - 1995 六月

All Science Journal Classification (ASJC) codes

  • 聚合物和塑料
  • 有機化學
  • 材料化學

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