Correlation and modeling of the occurrence of different crystalline forms of isotactic polypropylene as a function of cooling rate and uniaxial stress in thin and thick parts

被引：35

作者：

Choi, CH ^{[1
]}

White, JL ^{[1
]}

机构：

[1] Univ Akron, Inst Polymer Engn, Akron, OH 44325 USA

来源：

POLYMER ENGINEERING AND SCIENCE | 2000年 / 40卷 / 03期

关键词：

D O I：

10.1002/pen.11195

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A study of structure development in thin melt spun isotactic polypropylene filaments is described, which is then applied to the prediction of the behavior of thick parts. Conditions under which different crystalline forms of polypropylene are obtained as a function of cooling rate and spinline stress were investigated. Continuous cooling transformation (CCT) curves are developed. This also allows us to develop a map of crystalline form as a function of these variables. We have applied the CCT curves and this map to predict the development of cross-sectional variation structure in thick filaments and rods. This is applied in particular to the quenching of a cylindrical rod and the structural characterizations observed through the cross section are compared with predictions from the CCT curves and solutions of Fourier's transient heat conduction equation.

引用

页码：645 / 655

页数：11

共 54 条

[11] DEVELOPMENT OF STRESS-CRYSTALLIZED MORPHOLOGY DURING MELT-SPINNING OF POLYPROPYLENE FIBERS [J].

FUNG, PYF ;

ORLANDO, E ;

CARR, SH .

POLYMER ENGINEERING AND SCIENCE, 1973, 13 (04) :295-299

[12]

GEZOVICH DM, 1968, POLYM ENG SCI, V8, P210, DOI DOI 10.1002/PEN.760080306

[13]

GEZOVICH JDM, 1968, POLYM ENG SCI, V8, P202

[14]

Grange R.A., 1941, T ASM, V29, P85

[15]

ISHIZUKA O, 1976, SEN-I GAKKAISHI, V32, pT43

[16]

JAKOB M, 1956, HEAT TRANSFER

[17]

JAKOB M, 1931, FORSCH INGENIEURWES, V2, P435

[18]

Janeschitz-Kriegl H., 1984, Plastics and Rubber Processing and Applications, V4, P145

[19]

Janeschitz-Kriegl H., 1983, POLYM MELT RHEOLOGY, DOI DOI 10.1007/978-3-642-68822-5

[20] NON-ISOTHERMAL ORIENTATION-INDUCED CRYSTALLIZATION IN MELT SPINNING OF POLYPROPYLENE [J].

JINAN, C ;

KIKUTANI, T ;

TAKAKU, A ;

SHIMIZU, J .

JOURNAL OF APPLIED POLYMER SCIENCE, 1989, 37 (09) :2683-2697

← 1 2 3 4 5 6 →