EFFECT OF SATURATION ON THERMODYNAMICS OF POLYSTYRENE-POLYISOPRENE BLOCK-COPOLYMERS

被引：16

作者：

BALSARA, NP ^{[1
]}

LIN, CC ^{[1
]}

DAI, HJ ^{[1
]}

KRISHNAMOORTI, R ^{[1
]}

机构：

[1] PRINCETON UNIV,DEPT CHEM ENGN,PRINCETON,NJ 08544

来源：

MACROMOLECULES | 1994年 / 27卷 / 05期

关键词：

D O I：

10.1021/ma00083a021

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The effect of saturation on thermodynamic interactions in polystyrene-polyisoprene (SI) diblock copolymers is examined by small-angle neutron scattering (SANS) and birefringence. Experiments were conducted on an SI sample in which both blocks had molecular weights of 7.5 x 10(3) and its saturated product-a poly(vinylcyclohexane)-poly(methylbutylene) block copolymer (HSHI). The SANS data show a reversal in miscibility in the vicinity of 96-degrees-C. Above this temperature, the Flory-Huggins interaction parameter, chi, is higher in the HSHI polymer than in the SI polymer, while the reverse is true at temperatures below 96-degrees-C. The high-temperature result is consistent with published data of Gehlsen and Bates, while the low-temperature result is confirmed by birefringence measurements presented here.

引用

页码：1216 / 1220

页数：5

共 13 条

[1]

AMUNDSON KR, 1992, MACROMOLECULES, V25, P1953

[2] THERMODYNAMIC INTERACTIONS IN MODEL POLYOLEFIN BLENDS OBTAINED BY SMALL-ANGLE NEUTRON-SCATTERING [J].