Glass transition temperature obtained after Ln2 quenching studies for PTT and its blend

compositions.

Compositio

n

Tg(ºC)

LN2

quenched

(10ºCmin-1)

Tg(ºC)

LN2

quenched

(1ºC min-

1)

Tg(ºC)

LN2

quenched

(2ºC min-

1)

Tg(ºC)

LN2

quenched

(3º min-1)

Tg(ºC)

LN2

quenche

d

(4ºCmin-

1)100/0 44.79 39.87 40.59 41.94 42.0290/10 44.91 40.92 41.85 42.45 43.1480/20 45.15 41.29 41.38 42.14 42.6870/30 44.66 40.63 41.45 42.51 42.8960/40 44.65 41.29 42.61 42.48 42.790/100 88.84

Cold crystallization curves obtained at heating rate of 20ºC/min after heating and allowing to

cool in DSC. The peak temperature shifted from 75.56ºC for PTT to 74.40ºC for the 60/40

composition.

1

Avrami plots of Fig 4.(c) depicting the full conversion range.

2

0

1

2

3

4

5

6

175 180 185 190 195 200 205

k/m

in-n

Isothermal temperature/ºC

100 90/10 80/2070/30 60/40

2

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

175 180 185 190 195 200 205

n

Isothermal temperature/ºC

100/0 90/1080/20 70/3060/40

(a) (b)

0

1

2

3

4

5

6

175 180 185 190 195 200 205

t 0.1

/min

Isothermal temperature/ºC

100/0 90/10 80/20

70/30 60/40

0

2

4

6

8

10

12

175 180 185 190 195 200 205

t 0.5

/min

Isothermal temperature/ºC

100/0 90/10 80/20

70/30 60/40

(c) (d)

0

5

10

15

20

25

30

175 180 185 190 195 200 205

Δw/m

in

Isothermal temperature/ºC

100/0 90/10 80/20

70/30 60/40

(e)

Variation of (a) Avrami rate constant (k) (b) exponent (n), (c) induction time(t0.1), (d)half

time, (t0.5) and (e) peak width (Δw) with Tc for PTT and its blends.

3

-70

-60

-50

-40

-30

-20

-10

0175 180 185 190 195 200 205

ΔHc/J

g-1

Isothermal temperature/ºC

100/0 90/10 80/20

70/30 60/40

-70

-60

-50

-40

-30

-20

-10

0175 180 185 190 195 200 205

ΔHc(

nom

aliz

ed)/J

g-1

Isothermal temperature/ºC

100/0 90/1080/20 70/3060/40

(a) (b)

Variation of (a) enthalpy (ΔHc)and (b) normalized enthalpy ∆Hc(normalized) of crystallization

with Tc for PTT and its blends.

4

.

(a) (b)

(c) (d)

Melting behaviour of PTT and its blends in , (a) 90/10, (b) 80/20, (c) 70/30, and (d) 60/40

compositions after isothermal crystallization at different Tc.

5

180

190

200

210

220

230

240

250

260

270

280

180 200 220 240 260 280

Tm

/ºC

Tc /ºC

100/0 Tm=Tc

180

190

200

210

220

230

240

250

260

270

280

180 200 220 240 260 280

Tm

/ºC

Tc /ºC

90/10 Tm=Tc

(a) (b)

180

190

200

210

220

230

240

250

260

270

280

180 200 220 240 260 280

Tm

/ºC

Tc /ºC

80/20 Tm=Tc

150

170

190

210

230

250

270

290

150 175 200 225 250 275 300

Tm

/ºC

Tc /ºC

70/30

Tm=Tc

(c) (d)

180

190

200

210

220

230

240

250

260

270

280

180 200 220 240 260 280

Tm

/ºC

Tc /ºC

60/40 Tm=Tc

(e)

Hoffman Weeks Plot of PTT and its blends in (a)100/0, (b) 90/10, (c)80/20, (d) 70/30 and (e)

60/40 compositions.

6

Peak temperatures corresponding to melting of primary crystals

Tc/ºC 100/0 90/10 80/20 70/30 60/40peak I temperature /ºC

188 208.84 208.51 208.51 208.01 208.68190 209.7 209.7 209.53 209.87 209.7192 210.86 211.03 211.03 210.86 211.03194 212.35 212.35 212.18 212.35 212.52195 213.35 213.01 212.68 213.18 213.18196 214.18 213.34 213.68 213.51 213.84197 214.84 214.5 214 214.34 214.5198 216.03 214.87 214.53 214.7 215.03199 216.86 215.36 215.53 215.69 216.03200 216.53 216.19 215.69 216.03 216.53201 217.02 216.69 216.52 216.85 216.62

7