Crystalline spherulitic growth kinetics during shear for linear low-density polyethylene

被引：1

作者：

Tavichai, Orasa ^{[1
]}

Feng, Lijun ^{[1
]}

Kamal, Musa R. ^{[1
]}

机构：

[1] McGill Univ, Dept Chem Engn, Montreal, PQ H3A 2B2, Canada

来源：

POLYMER ENGINEERING AND SCIENCE | 2006年 / 46卷 / 10期

关键词：

D O I：

10.1002/pen.20608

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The Linkam shearing cell was used in conjunction with a polarized light microscope to study the isothermal crystallization process of linear low-density polyethylene resins under simple shear flow. The growth of spherulitic morphology was observed under slow shear rates (less than 1 s(-1)). The crystalline spherulitic growth rate increases, as the shear rate increases. This has been attributed to the decrease of the activation diffusion energy. A relationship between the activation diffusion energy and the shear rate is proposed, under the experimental conditions employed. The modified Hoffman-Lauritzen equation successfully describes spherulitic crystallization kinetics under shear conditions, when the appropriate value of activation diffusion energy is employed.

引用

页码：1468 / 1475

页数：8

共 24 条

[1]

Berry G. C., 1968, ADV POLYM SCI, V5, P261

[2] Microrheological modeling of flow-induced crystallization [J].

Coppola, S ;

Grizzuti, N ;

Maffettone, PL .

MACROMOLECULES, 2001, 34 (14) :5030-5036

[3] Effects of the degree of undercooling on flow induced crystallization in polymer melts [J].

Coppola, S ;

Balzano, L ;

Gioffredi, E ;

Maffettone, PL ;

Grizzuti, N .

POLYMER, 2004, 45 (10) :3249-3256

[4]

EDER G, 1997, MAT SCI TECHNOLOGY, V18, P296

[5] Spherulitic crystallization behavior of linear low-density polyethylene [J].

Feng, L ;

Kamal, MR .

POLYMER ENGINEERING AND SCIENCE, 2005, 45 (01) :74-83

[6]

FLETCHER DP, 1985, POLYM COMMUN, V26, P2

[7] EFFECTS OF SHEAR STRESS ON CRYSTALLIZATION OF LINEAR POLYETHYLENE AND POLYBUTENE-1 [J].

HAAS, TW ;

MAXWELL, B .

POLYMER ENGINEERING AND SCIENCE, 1969, 9 (04) :225-&

[8]

Hoffman J.D., 1976, TREATISE SOLID STATE, DOI [10.1007/978-1-4684-2664-9_7, DOI 10.1007/978-1-4684-2664-9_7]

[9] Kinetics of crystallization from the melt and chain folding in polyethylene fractions revisited: Theory and experiment [J].

Hoffman, JD ;

Miller, RL .

POLYMER, 1997, 38 (13) :3151-3212

[10] Morphological modeling of polymer solidification [J].

Huang, T ;

Kamal, MR .

POLYMER ENGINEERING AND SCIENCE, 2000, 40 (08) :1796-1808

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