Table 3: Thermal properties of polyimides and copolyimides containing phenolic OH groups and these polyimides reacted with 12GA.

Thermal properties Dianhydridea Diamine 12GAb mol% mol% mol% °C Air N2 Air N2 Air           °C °C °C °C °C Cyclohexene-DA HAB DDE               20 80 0 248 317 303 383 430 423 455 50 50 0 233 303 284 357 391 385 430 100 0 0 283 270 276 337 356 355 392 20 80 40 249 255 371 311 441 387 459 50 50 100 248 265 289 329 368 353 393 100 0 200 226 228 289 304 367 330 387 6FDA HAB DDE                 20 80 0 263 321 419 483 550 553 574 50 50 0 244 311 403 406 522 522 562 100 0 0 250 297 308 381 394 469 489 20 80 40 276 337 383 526 549 561 574 50 50 100 238 304 307 450 410 537 520 100 0 200 250 253 268 325 404 397 446 DSDA HAB DDE                 20 80 0 254 331 334 498 502 549 557 50 50 0 242 304 315 392 410 484 489 100 0 0 248 307 300 373 383 477 467 20 80 40 251 314 321 421 460 474 524 50 50 100 243 271 273 333 358 384 412 100 0 200 252 268 291 314 346 338 380

aEquimolar amount of tetracarboxylic dianhydride was used to the total amount of diamines. bEquimolar amount of 12GA was used to the total amount of phenolic OH groups, and the reaction was proceeded using a equimolar amount of DCC as a catalyst. cSoftening temperature, measured by TMA at a heating rate of 10°C/min in N2 on second heating. dInitial decomposition temperature, measured by TGA at a heating rate of 10°C/min. e5% Weight loss temperature, measured by TGA at a heating rate of 10°C/min. f10% Weight loss temperature, measured by TGA at a heating rate of 10°C/min.