CRYSTALLIZATION BEHAVIOR OF POLY(3,3-BISETHOXYMETHYL OXETANE) AND POLY(3,3-BISAZIDOMETHYL OXETANE)

被引：24

作者：

HARDENSTINE, KE ^{[1
]}

HENDERSON, GVS ^{[1
]}

SPERLING, LH ^{[1
]}

MURPHY, CJ ^{[1
]}

MANSER, GE ^{[1
]}

机构：

[1] THIOKOL WASATCH DIV,BRIGHAM CITY,UT 84302

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 1985年 / 23卷 / 08期

关键词：

CALORIMETRY - Applications - Copolymers - Thermoplastic elastomers - X-ray analysis;

D O I：

10.1002/pol.1985.180230812

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Two crystal modifications have been found for poly(3,3-bisethoxymethyl oxetane) left bracket poly(BEMO) right bracket by wide-angle x-ray powder diffraction and differential scanning calorimetry, while only one modification has been found for poly(3,3-bisazidomethyl oxetane) left bracket poly(BAMO) right bracket . Melting temperatures for the two polymers were nearly the same, varying from about 70 to about 90 degree C depending on the thermal treatment; higher crystallization temperatures resulted in higher melting temperatures. The equilibrium melting temperature was found to be 125 and 128 degree C for poly(BEMO) and poly(BAMO), respectively, by using the Hoffman-Weeks extrapolation procedure. Measurement of the melting-point depression of poly(BEMO) and poly(BAMO) in dibutyl phthalate yielded enthalpy of fusion values of 2. 25 and 12. 8 kcal/mol, respectively. The percent crystallinity for poly(BEMO) and poly(BAMO), respectively, was calculated to be 55-60 and 13-30% based on DSC and x-ray analysis.

引用

页码：1597 / 1609

页数：13

共 30 条

[1] RELATION BETWEEN MELTING BEHAVIOR AND PHYSICAL STRUCTURE IN POLYMERS [J].