THE RING-OPENING POLYMERIZATION OF D,L-LACTIDE IN THE MELT INITIATED WITH TETRAPHENYLTIN

被引:99
作者
KOHN, FE [1 ]
VANDENBERG, JWA [1 ]
VANDERIDDER, G [1 ]
FEIJEN, J [1 ]
机构
[1] TWENTE UNIV TECHNOL,DEPT CHEM TECHNOL,DIV POLYMER,7500 AE ENSCHEDE,NETHERLANDS
关键词
CATALYSTS - Tetraphenyltin - CHEMICAL REACTIONS - Reaction Kinetics - CHROMATOGRAPHIC ANALYSIS - Gel Permeation - MONOMERS - Chemistry - POLYESTERS - Molecular Weight;
D O I
10.1002/app.1984.070291255
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Melt polymerization conditions for D,L-lactide initiated with tetraphenyltin were studied with regard to polymer molecular weight and weight distributions. Single polymerizations using constant initiator concentrations resulted in a broad scattering of nonreproducible molecular weight values. Multiple polymerizations at constant initiator concentrations, however, resulted in nearly identical molecular weight profiles. The presence of hydrolysis products of lactide during the melt polymerization most likely has a detrimental effect on molecular weight. After a short induction period the rather slow polymerization of D,L-lactide resulted in a maximal molecular weight followed by a slight decrease in molecular weight to a constant value. It is concluded that the polymerization of D,L-lactide in the melt initiated with tetraphenyltin does not proceed through a 'living' mechanism.
引用
收藏
页码:4265 / 4277
页数:13
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共 50 条
  • [41] SINCLAIR RG, 1972, AD748410
  • [42] SORENSON WR, 1968, PREPARATIVE METHODS, P12
  • [43] VANDENBERG JWA, 1981, EUR POLYM J, V17, P930
  • [44] CHARACTERIZATION OF POLY(D,L-LACTIC ACID) BY GEL-PERMEATION CHROMATOGRAPHY
    VANDIJK, JAPP
    SMIT, JAM
    KOHN, FE
    FEIJEN, J
    [J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1983, 21 (01) : 197 - 208
  • [45] STRUCTURE OF 3,6-DIMETHYL-1,4-DIOXANE-2,5-DIONE [D-,D-(L-,L-)LACTIDE]
    VANHUMMEL, GJ
    HARKEMA, S
    KOHN, FE
    FEIJEN, J
    [J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1982, 38 (MAY): : 1679 - 1681
  • [46] Vert M., 1981, MAKROMOL CHEM S, V5, P30
  • [47] WASSERMAN D, 1974, Patent No. 3839297
  • [48] YOUNG RH, 1977, ACTA CHEM SCAND S SE, V59, P152
  • [49] 1974, MODEL 200 GEL PERMEA, pC4
  • [50] 1963, Patent No. 932382