How to determine high growth speeds in polymer crystallization

被引：47

作者：

Ratajski, E ^{[1
]}

JaneschitzKriegl, H ^{[1
]}

机构：

[1] UNIV LINZ,INST CHEM,A-4040 LINZ,AUSTRIA

来源：

COLLOID AND POLYMER SCIENCE | 1996年 / 274卷 / 10期

关键词：

i-PP; alpha- and beta-; modification; HDPE; crystal growth; induction; heat transfer;

D O I：

10.1007/BF00656623

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

With the fast crystallizing polymers HDPE and i-PP it is extremely difficult to extend the range of measurements of the growth speed of spherulites to temperatures as low as 80 degrees C. So far the lower limit for these measurements has been about 120 degrees C for both polymers. Several possibilities for this kind of measurements are explored in the present paper. It appears that none of these measurements is without uncertainties. So, only the comparison of results, as obtained with several independent measurements and with theory furnishes a sufficient credibility. Optical measurements, from light scattering to visual inspection, all under very special conditions of heat transfer, are described.

引用

页码：938 / 951

页数：14

共 44 条

[1]

BARHAM PJ, 1982, J POLYM SCI PP, P1773

[2]

BASSET DC, 1981, PRINCIPLES POLYM MOR, P10

[3] ON THE LAMELLAR MORPHOLOGY OF ISOTACTIC POLYPROPYLENE SPHERULITES [J].