Interrelationships of Pressure-Dependent Hole Fraction and Elongational Viscosity in Polymer Melts

Table 1

Rheological parameters computed from (5) and (6) in parenthesis in terms of three different temperatures at ambient pressure.

Polymer	T (°C)	q			η0 (Pa.s)	τ (Pa)		R^2
LDPE60	150; 170; 190	0.655; (0.507)	0.238; (0.447)	0.901; (0.886)	17535.7; (25744.2); 17291.2; (24243.4); 8002.41; (9094.53)	9.9122×10^7; (1.999×10^6); 767495; (244722); 1.58501×10^6; (1.3827×10^6)	2.82; (6.14); 7.24; (4.49); 1.89; (1.95)	0.99898; (0.99234); 0.99429; (0.99793); 0.99977; (0.99961)
LDPE65	150; 170; 190	0.660; (0.820)	0.231; (0.068)	0.902; (0.937)	50800.3; (51657.7); 24061.8; (24089.5); 16430; (16364)	2.03715×10^6 (221494); 1.04557×10^9 (3.5902×10^7); 2.27597×10^7 (2.8256×10^6)	8.46; (9.38); 2.83; (2.83); 3.45; (3.44)	0.99155; (0.99002); 0.99887; (0.99893); 0.99860; (0.99860)
LLDPE	150; 170; 190	0.547; (0.649)	0.387; (0.245)	0.889; (0.900)	29500.4; (27429.7); 15524.9; (14189.6); 14798.2; (13531.6)	208213; (130950); 306655; (199260); 208924; (136025)	2.44; (2.71); 0.68; (0.68); 4.94; (5.00)	0.99903; (0.99893); 0.99994; (0.99994); 0.99748; (0.99755)
HDPE	170; 190; 210	0.499; (0.494)	0.459; (0.467)	0.886; (0.886)	396457; (464905); 174351; (187253); 115812; (120758)	18863.3; (15151.1); 43466.5; (38795.4); 51574.5; (47922.2)	0.54; (0.53); 2.70; (2.71); 3.01; (3.01)	0.99996; (0.99996); 0.99895; (0.99894); 0.99887; (0.99886)
PMMA	230; 240; 250	0.523; (0.630)	0.423; (0.270)	0.887; (0.897)	243538; (281487); 239972; (230746); 177553; (157033)	127536; (114841); 56457.2; (51143.9); 34318.5; (36123.8)	3.27; (7.17); 6.06; (7.13); 5.28; (4.95)	0.99886; (0.98958); 0.99688; (0.99513); 0.99750; (0.99780)
PC	280; 290; 300	0.832; (0.757)	0.059; (0.004)	0.940; (0.982)	3031.34 (4591.78); 3535.29 (4167.8); 3886.5 (7982.78)	553155 (39800.3); 698105 (95812.8); 480617 (26169.9)	6.51; (7.91); 5.06; (7.13); 7.34; (5.20)	0.99359 (0.99156); 0.99687 (0.99468); 0.99496 (0.99748)
PP	190; 210; 230	0.258; (0.486)	0.462; (0.479)	0.8861; (0.886)	146262; (52099.9); 115212; (50774); 108176; (44800.8)	10432.9; (17176.4); 10760.2; (13328.4); 6192.31; (8330.87)	3.08; (2.93); 3.83; (3.88); 0.55; (0.56)	0.99872; (0.99890); 0.99822; (0.99815); 0.99997; (0.99997)
PS	190; 210; 230	0.580; (0.552)	0.339; (0.380)	0.891; (0.889)	101383; (140943); 17697.6; (19396.4); 15978.4; (13049.7)	361180; (122334); 491802; (306492); 172216; (184296)	3.96; (4.05); 9.44; (8.91); 4.98; (9.76)	0.99837; (0.99844); 0.99014; (0.99107); 0.99671; (0.99006)