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Synthesis and properties of novel benzocyclobutene‐functionalized siloxane thermosets
Author(s) -
Yang Jun,
Cheng Yuanrong,
Jin Yunxia,
Xiao Fei
Publication year - 2013
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4467
Subject(s) - benzocyclobutene , siloxane , materials science , glass transition , thermosetting polymer , differential scanning calorimetry , curing (chemistry) , thermal stability , polymer , polymer chemistry , monomer , chemical engineering , composite material , physics , engineering , thermodynamics
Two kinds of novel benzocyclobutene ( BCB ) functionalized monomers were synthesized through imidization of siloxane‐containing dianhydride with 4‐aminobenzocyclobutene. The BCB monomers obtained exhibited good solubility in various organic solvents. They were converted into crosslinked polymer via ring opening and the following Diels–Alder reaction at proper temperature. The curing kinetics were studied by non‐isothermal differential scanning calorimetry. The BCB polymers showed good thermal stability, excellent dielectric properties, low water absorption and good planarization. Moreover, the thermal and mechanical properties of the BCB resins could be adjusted by the length of the siloxane unit. The BCB resins with a shorter siloxane chain exhibited higher glass transition temperature, higher modulus and lower coefficient of thermal expansion than BCB resins with longer chains. © 2013 Society of Chemical Industry