Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The Formation of Supermolecular Polycaprolactone (PCL) Spherulites in Polystyrene-Polybutadiene-PCL (PS-b-PB-b-PCL) Semicrystalline Block Copolymer

Published

Author(s)

G Kim, C L. Jackson, V Balsamo, M Libera, R Stadler, Charles C. Han

Abstract

The morphological behavior of (PS)0.35(PB)0.15(PCL)0.5 semicrystalline block copolymers as a function of annealing conditions are discussed. For this study, the bulk and thick films of (PS)0.35(PB)0.15(PCL)0.5 were cast from toluene solution and the morphologies were examined using transmission electron microscopy (TEM) and optical microscopy (OM). The morphology ofeither as-cast or annealed bulk (~1 mm) specimens is a lamellar-cylindrical morphology having PB cylinders at the interphase boundaries. The block copolymer thick film (~ 5 mm to 10 mm) from fast solvent evaporation also shows a lamellar-cylindrical microphase-separated morphology without the formation of visible PCL spherulites using OM. After the formation of the well-defined PCL spherulites by annealing, the micromorphology is no longer lamellar-cylindrical but instead the PCL lamellar crystals dominate the system.
Proceedings Title
Proceedings of ANTEC 99
Volume
2
Conference Dates
May 2-6, 1999
Conference Title
ANTEC Conference Proceedings

Keywords

block polymer, lamellar crystal, lamellar-cylindrical morphology, microphase separation, optical microscopy, polybutadiene polycaprolactone

Citation

Kim, G. , Jackson, C. , Balsamo, V. , Libera, M. , Stadler, R. and Han, C. (1998), The Formation of Supermolecular Polycaprolactone (PCL) Spherulites in Polystyrene-Polybutadiene-PCL (PS-b-PB-b-PCL) Semicrystalline Block Copolymer, Proceedings of ANTEC 99 (Accessed April 20, 2024)
Created November 1, 1998, Updated February 17, 2017