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One-step, one-pot process for preparing multiblock and gradient copolymer

A technology for block copolymers and copolymers, applied in the field of one-step, one-pot methods for preparing multi-block and gradient copolymers

Inactive Publication Date: 2013-10-30
TOTAL RES & TECH FELUY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, there is room for improvement in those simultaneous copolymerizations of cyclic esters and cyclic carbonates

Method used

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  • One-step, one-pot process for preparing multiblock and gradient copolymer
  • One-step, one-pot process for preparing multiblock and gradient copolymer
  • One-step, one-pot process for preparing multiblock and gradient copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Using the organometallic complex (BDI) Zn[N(SiMe 3 ) 2 ] Copolymerization of TMC and L-LA in one step, one pot.

[0094]

[0095] Option 4

[0096] The initial ratio [TMC] / [L-LA] / [Zn] / [BnOH] is fixed at 250 / 250 / 1 / 5. The reaction was stopped after a period of 3-360 minutes. The results are shown in Table 1.

[0097] Table 1.

[0098]

[0099]

[0100] a: Mn 理论 is as {[TMC] / [BnOH]×M TMC × conversion rate TMC +([L-LA] / [BnOH]×M L-LA × conversion rate LLA}+M BnOH Calculated, where M L-LA =144g / mol, M TMC =102g / mol, M BnOH =108g / mol.

[0101] b: Determined by SEC (Size Exclusion Chromatography) using polystyrene as reference with correction coefficients of 0.58 for PLLA and 0.73 for PTMC.

[0102] These results show that for the same ratio of TMC and L-LA, consumption of lactide is much faster than that of cyclic carbonate. Theoretical and experimental molecular weights are in good agreement, and the molecular weight distribution, defined as the rat...

Embodiment 2

[0110] The percentage of TMC relative to L-LA was varied between 2 and 20% by weight. In toluene solution (2.0M) and at a temperature of 110°C, in the organometallic complex (BDI) Zn[N(SiMe 3 ) 2 ] and benzyl alcohol (BnOH) in the presence of polymerization. The ratio of [LLA] / [Zn] / [BnOH] is fixed at 1500 / 1 / 5. The reaction was stopped after a period of 0.5-24 hours to ensure that complete conversion of the monomers was achieved. The results are shown in Table 3.

[0111] table 3.

[0112]

[0113] a: The reaction time corresponds to the time necessary for complete conversion of each monomer.

[0114] b: Mn 理论 is as {[TMC] / [BnOH]×M TMC × conversion rate TMC +([LLA] / [BnOH]×M LLA × conversion rate LLA}+M BnOH Calculated, where M LLA =144g / mol, M TMC =102g / mol, M BnOH =108g / mol.

[0115] c: Determined by SEC (Size Exclusion Chromatography) using polystyrene as reference, with correction coefficients of 0.58 for PLLA and 0.73 for PTMC.

[0116] As can be seen f...

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Abstract

The present invention relates to the field of tailored di-, tri- and multi-block as well as gradient polyesters / polycarbonates copolymers prepared by introducing monomers simultaneously in the reaction medium in the presence of an organometallic, metal salt or organic catalyst.

Description

technical field [0001] The present invention relates to the field of tailored di-, tri- and multi-block and gradient polyester / polycarbonate copolymers by simultaneous introduction of monomers into the reaction medium in the presence of organometallic, metal salt or organic catalysts prepared in. Background technique [0002] There is a clear need for polymeric materials based on renewable resources and efficient methods of making them. Of particular interest are block copolymers that allow tuning of physical properties to obtain very specific physical properties, such as phase separation of the blocks, while tuning the size and properties of the individual blocks. As an example, soft poly(trimethylene carbonate) blocks (PTMC) are combined with hard crystallizable poly(L- or D-lactide) blocks (PLLA, PDLA), thus forming the so-called Diblock and triblock polycarbonate-polyesters of thermoplastic elastomers are biodegradable and biocompatible, and thus find application as bi...

Claims

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Application Information

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IPC IPC(8): C08G63/08C08G63/64C08G64/02C08G64/30
CPCC08G64/30C08G63/08C08G64/0208C08G64/18C08G63/64C08G63/83C08G63/84C08G63/87
Inventor M.赫洛S.吉劳姆J-F.卡彭蒂尔M.斯拉温斯基W.古尔林
Owner TOTAL RES & TECH FELUY
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