STABILIZATION AND MODIFICATION OF POLYETHYLENETEREPHTHALATE - Photochemical Reactions in Heterochain Polymers - page 123

Table 28. Thermal characteristics of used hexaazocyclanes and initial polyethylene
terephthalate

Compounds Melting

T, 0 C

T of beginning of
decay, 0 C

T of mass loss, ºC

5% 10% 29%

HC-1 305 330 435 480 552

HC-2 327 345 437 467 518

HC-3 315 327 409 455 507

HC-4 345 330 415 449 480

HC-5 335 365 469 490 539

HC-6 327 350 440 500 553

HC-7 300 347 425 486 586

PETP 269 320 360 415 428

Figure 3.2. Electronic absorption spectra of hexaazocyclanes HC-1 (1), HC - 2 (2), HC - 3 (3), HC - 4
(4), HC - 5 (5), HC - 6 (6), HC - 7 (7).

3.4. M ODIFICATION OF PETP BY H EXAAZONCYCLANES

One of the methods of introducing plasticizers, dyes and other additives into PETP is
modification at the stage of synthesis.