Thermal- and photo-polymerization of (meth) acrylates containing a spiro ortho ester moiety and the properties of poly[(meth)acrylate]s.
The syntheses and polymerizations of acrylate (ASOE) and methacrylate (MASOE) containing spiro ortho ester moieties were carried out and the properties of the polymers obtained were investigated. The ring-opening reaction of the spiro ortho ester groups proceeded well during heat polymerization (HC) with the ionic initiators (BSS and HPSS). However, a small amount of unreacted carbon-carbon double bond was observed in the polymers obtained. Not only vinyl polymerization but also a small amount of ring-opening reaction took place during polymerization with radical initiators (BPO, AIBN, DTB and CQ). The poly-(MASOE)s obtained by HC with BSS, BSS/AIBN and BSS/BPO were plastic like polymers. Low volume shrinkage was observed during HC and UVLC of ASOE and MASOE with ionic initiators. These shrinkages were smaller than those of conventional methacrylate.
Department of Dental Materials and Devices, Fukuoka Dental College, Japan.
K
K
Miyazaki
T
T
Takata
T
T
Endo
A
A
Inanaga
D000179:Acrylates / Q000737:chemistry*; D004952:Esters; D006358:Hot Temperature; D008027:Light; D008689:Methacrylates / Q000737:chemistry*; D011109:Polymethacrylic Acids / Q000737:chemistry*; D013141:Spiro Compounds / Q000737:chemistry*
D000179:Acrylates; D004952:Esters; D008689:Methacrylates; D011109:Polymethacrylic Acids; D013141:Spiro Compounds