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Polymer and method for producing the same

A technology of polymers and compounds, applied in the field of polymers, can solve the problem of no monomers capable of ring-opening polymerization, and achieve the effect of reducing formability and thermal stability

Active Publication Date: 2011-09-21
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] However, this method also cannot without problems produce polymer particles having a molecular weight distribution (Mw / Mn) of 2 or less
Furthermore, there is no description of ring-opening polymerizable monomers
[0025] As described above, there is no report on the use of supercritical carbon dioxide as a solvent without using a metal catalyst at a lower temperature and a higher temperature than conventional cases from the viewpoint of cost reduction, environmental load reduction, energy saving, and resource saving. Yield Process for producing polymer particles (including polylactic acid) with narrow molecular weight distribution from ring-opening polymerizable monomers (used as raw materials) in one step

Method used

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  • Polymer and method for producing the same
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  • Polymer and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0167] Lactide (90 parts by mass) of L-lactic acid, lactide (10 parts by mass) of D-lactic acid, and 3.00 mol% of lauryl alcohol relative to 100 mol% of monomers (acting as an initiator) were placed in a pressure vessel. agent) and 4-pyrrolidinylpyridine (PPY) (3.3 parts by mass), and then heated to 60°C.

[0168] Subsequently, supercritical carbon dioxide (60°C, 10 MPa) was added thereto, followed by reaction at 60°C for 12 hours.

[0169] After the reaction was completed, the flow rate at the outlet of the back pressure valve was adjusted to 5.0 L / min using a pressure pump and a back pressure valve. Then, supercritical carbon dioxide was flowed for 30 minutes, and PPY and residual monomer (lactide) were removed.

[0170] Thereafter, the reaction system was gradually returned to normal temperature and pressure. After three hours, the polymer (polylactic acid) contained in the container was taken out.

[0171] Using the above method, the physical properties (Mn, Mw / Mn, poly...

Embodiment 1-2 to 1-4

[0173] The procedure of Example 1-1 was repeated except that the amount of the initiator was changed as shown in each column of Examples 1-2 to 1-4 in Table 1-1, thereby obtaining a polymer.

[0174] Using the above method, the physical properties of the obtained polymer were measured, as shown in Table 1-1.

Embodiment 1-5 to 1-7

[0176] The procedure of Example 1-1 was repeated except that the reaction temperature was changed as shown in each column of Examples 1-5 to 1-7 in Table 1-1, thereby obtaining a polymer.

[0177] Using the above method, the physical properties of the obtained polymer were measured, as shown in Table 1-1.

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Abstract

The invention relates to a polymer and a method for producing the same. The method for producing the polymer, includes polymerizing a ring-opening polymerizable monomer in a compressive fluid with a metal-free organic catalyst to produce a polymer.

Description

technical field [0001] The present invention relates to a process for the manufacture of polymers by polymerization of ring-opening polymerizable monomers in the presence of an organic catalyst in a compressed fluid, and to the polymers obtained by this process. Background technique [0002] Petroleum-derived plastics have been mass-produced to support our lives in various ways because most of them are light, strong, have excellent durability, and can be easily molded into desired shapes. However, when released into the environment, these plastics accumulate and do not readily degrade. Moreover, they emit large amounts of carbon dioxide during combustion, which accelerates the process of global warming. [0003] In order to protect the global environment, attention has recently been paid to resins made of non-petroleum materials or biodegradable resins degraded by, for example, microorganisms in the natural environment, and research on these resins has been conducted all ov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/08C08G63/87C08G64/30C08G63/64C08G18/42C08G18/44
CPCC08G64/38C08G63/823C08G63/08C08G64/0208C08G64/20C08G63/81
Inventor 根本太一间瀬畅之佐古猛冈岛泉森俊介田中千秋山内祥敬石塚润
Owner RICOH KK
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