Thermal behavior of syndiotactic polystyrene/1,2-dichloroethane gels and stoichiometry of polymer-solvent compounds

被引：6

作者：

Daniel, C ^{[1
]}

Guerra, G ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Chim, I-84081 Baronissi, SA, Italy

来源：

SOFT MATERIALS | 2004年 / 2卷 / 01期

关键词：

syndiotactic polystyrene; 1,2-dichloroethane; thermoreversible gels; differential scanning calorimetry; polymer-solvent compounds;

D O I：

10.1081/smts-120039336

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phase behavior of syndiotactic polystyrene (sPS)/1,2-dichloroethane (DCE) gels has been investigated by differential scanning calorimetry (DSC) and wide angle x-ray diffraction (WAXD) for different gel formation conditions. DSC data show that the gel melting temperatures are independent of the cooling conditions leading to gel formation, whereas the melting enthalpies of the gels depend on the cooling history. WAXD measurements show that for low concentration gels the sPS/DCE clathrate structure is obtained, whereas for high concentration gels both the clathrate structure and the solvent-free beta phase can be obtained. Furthermore, the onset of formation of the beta phase is dependent on the cooling rate. In light of combined DSC and WAXD data, the reliability of the DSC in evaluating the absolute stoichiometry of polymer-solvent compounds formed in sPS/DCE gels is discussed.

引用

页码：47 / 56

页数：10

共 26 条

[1] CYCLIC ETHER CLATHRATES - STOICHIOMETRY DEDUCED FROM WATER-CYCLIC ETHER PHASE-DIAGRAMS [J].

CARBONNE.L ;

ROSSO, JC .

JOURNAL OF SOLID STATE CHEMISTRY, 1973, 8 (04) :304-311

[2] STRUCTURAL STUDY ON SYNDIOTACTIC POLYSTYRENE .2. CRYSTAL-STRUCTURE OF MOLECULAR-COMPOUND WITH TOLUENE [J].

CHATANI, Y ;

SHIMANE, Y ;

INAGAKI, T ;

IJITSU, T ;

YUKINARI, T ;

SHIKUMA, H .

POLYMER, 1993, 34 (08) :1620-1624

[3] STRUCTURAL STUDY ON SYNDIOTACTIC POLYSTYRENE .4. FORMATION AND CRYSTAL-STRUCTURE OF MOLECULAR-COMPOUND WITH IODINE [J].

CHATANI, Y ;

INAGAKI, T ;

SHIMANE, Y ;

SHIKUMA, H .

POLYMER, 1993, 34 (23) :4841-4845

[4] ON THE DEFINITION OF THERMOREVERSIBLE GELS - THE CASE OF SYNDIOTACTIC POLYSTYRENE [J].

DANIEL, C ;

DAMMER, C ;

GUENET, JM .

POLYMER, 1994, 35 (19) :4243-4246

[5] Clathrate phase in syndiotactic polystyrene gels [J].

Daniel, C ;

Guerra, G ;

Musto, P .

MACROMOLECULES, 2002, 35 (06) :2243-2251

[6] Evaluation of the amount and composition of the polymer-rich and polymer-poor phases of syndiotactic polystyrene gels with binary solvent mixtures [J].

Daniel, C ;

Alfano, D ;

Guerra, G ;

Musto, P .

MACROMOLECULES, 2003, 36 (15) :5742-5750

[7] Physical gelation of syndiotactic polystyrene in the presence of large molar volume solvents induced by volatile guests of clathrate phases [J].

Daniel, C ;

Alfano, D ;

Guerra, G ;

Musto, P .

MACROMOLECULES, 2003, 36 (05) :1713-1716

[8] Thermoreversible gelation of syndiotactic polystyrene in toluene and chloroform [J].

Daniel, C ;

Menelle, A ;

Brulet, A ;

Guenet, JM .

POLYMER, 1997, 38 (16) :4193-4199

[9] Thermoreversible gelation of syndiotactic polystyrene in benzene [J].

Daniel, C ;

Deluca, MD ;

Guenet, JM ;

Brulet, A ;

Menelle, A .

POLYMER, 1996, 37 (07) :1273-1280

[10] Crystal structure of the clathrate δ form of syndiotactic polystyrene containing 1,2-dichloroethane [J].

De Rosa, C ;

Rizzo, P ;

de Ballesteros, OR ;

Petraccone, V ;

Guerra, G .

POLYMER, 1999, 40 (08) :2103-2110

← 1 2 3 →