JPH10306191A - Composite of polyvinyl alcohol/ethylene-vinyl alcohol copolymer - Google Patents

Composite of polyvinyl alcohol/ethylene-vinyl alcohol copolymer

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Publication number
JPH10306191A
JPH10306191A JP8275181A JP27518196A JPH10306191A JP H10306191 A JPH10306191 A JP H10306191A JP 8275181 A JP8275181 A JP 8275181A JP 27518196 A JP27518196 A JP 27518196A JP H10306191 A JPH10306191 A JP H10306191A
Authority
JP
Japan
Prior art keywords
ethylene
polyvinyl alcohol
composite
vinyl alcohol
alcohol copolymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8275181A
Other languages
Japanese (ja)
Inventor
Genjitsu Kuruma
源日 車
Jiyoukiyuu Gen
丞烋 玄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BMG Inc
Original Assignee
BMG Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BMG Inc filed Critical BMG Inc
Priority to JP8275181A priority Critical patent/JPH10306191A/en
Publication of JPH10306191A publication Critical patent/JPH10306191A/en
Pending legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a composite having higher strengths and water content than conventionally obtd. by dissolving a mixture of polyvinyl alcohol and an ethylene-vinyl alcohol copolymer in a common solvent for the two polymers and extruding the resultant soln. into a poor solvent. SOLUTION: This composite is obtd. from a soln. which is prepd. by dissolving a mixture of polyvinyl alcohol and an ethylene-vinyl alcohol copolymer in a common solvent for the two polymers or is prepd. by dissolving these polymers separately in a common solvent and mixing the resultant two solns. Examples of the common solvent are dimethyl sulfoxide, ethylene glycol, 1,3- dimethyl-2-imidazolidinone, glycerin, and mixtures of these solvents with water. The above-prepd. perfect soln. is extruded into a poor solvent (e.g. methanol) to give moldings such as composite films, fibers, or tubes.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】生体はその70wt%以上は水で
あり、骨、歯等の硬組織を除けばすべてハイドロゲルで
構成されていることからハイドロゲルは医用材料として
注目されている。又、工業用材料としもハイドロゲルの
特性が注目されるようになり、種々の分野での応用研究
が多く行われている。
2. Description of the Related Art Hydrogels are attracting attention as medical materials because 70% by weight or more of water is composed of hydrogel except for hard tissues such as bones and teeth. In addition, the properties of hydrogels have been attracting attention as industrial materials, and many applications have been studied in various fields.

【0002】また、超高分子量ポリエチレンのゲル紡糸
から高強度・高弾性率繊維が得られるようになり、高強
度・高弾性率繊維化を行うためのゲルを用いた研究が多
く行われている。
In addition, high strength and high modulus fibers can be obtained from gel spinning of ultra-high molecular weight polyethylene, and many studies using gels for producing high strength and high modulus fibers have been conducted. .

【0003】[0003]

【従来の技術】ポリビニルアルコールは側鎖に親水性の
水酸基を有する代表的な親水性高分子である。側鎖の水
酸基の化学的および物理的架橋により容易にゲル化する
ことから多くの研究が行われ、種々のゲル化方法が知ら
れている。
2. Description of the Related Art Polyvinyl alcohol is a typical hydrophilic polymer having a hydrophilic hydroxyl group in a side chain. Many studies have been made on the fact that gelation occurs easily due to chemical and physical cross-linking of hydroxyl groups in the side chains, and various gelling methods are known.

【0004】物理的架橋による代表的な方法としてポリ
ビルアルコール濃厚溶液の低温結晶化法が良く知られて
いる。特に、ポリビニルアルコールを水/ジメチルスル
ホキシドのような混合溶媒に溶解させた後、その溶液を
低温で放置し、ポリビニルアルコールを低温結晶化させ
て得られるハイドロゲルは透明で機械的特性に優れてい
ることから医用材料としての応用研究が活発に行われて
いる。
As a typical method by physical crosslinking, a low-temperature crystallization method of a concentrated solution of polyvinyl alcohol is well known. In particular, a hydrogel obtained by dissolving polyvinyl alcohol in a mixed solvent such as water / dimethyl sulfoxide, leaving the solution at low temperature, and crystallizing polyvinyl alcohol at low temperature is transparent and has excellent mechanical properties. Therefore, applied research as a medical material is actively conducted.

【0005】さらにポリビニルアルコールは平面ジグザ
グ構造を有することから高強度・高弾性率繊維の材料と
しても注目され、側鎖の水酸基の存在により比較的低い
分子量で水/有機溶媒混合溶媒からのゲル紡糸により
2.5GPa以上の強度を有する高強度・高弾性率繊維
が得られている。
Further, polyvinyl alcohol has attracted attention as a material for high-strength and high-modulus fibers because of its planar zigzag structure. As a result, a high-strength, high-modulus fiber having a strength of 2.5 GPa or more is obtained.

【0006】一般にハイドロゲルおよび繊維における機
械的強度は高分子材料の分子量に依存し、また、分子量
を高めることにより機械的強度を高めることができる。
しかしながらポリビニルアルコールは側鎖の水酸基によ
り比較的低い分子量で高い強度を有するハイドロゲルお
よび繊維が得られるものの、大きな分子量依存性は認め
られず、さらに高い強度を有するハイドロゲルおよび繊
維を得ることは困難である。
Generally, the mechanical strength of hydrogels and fibers depends on the molecular weight of a polymer material, and the mechanical strength can be increased by increasing the molecular weight.
However, although polyvinyl alcohol can provide hydrogels and fibers having high strength at relatively low molecular weight due to hydroxyl groups on the side chains, there is no large molecular weight dependency, and it is difficult to obtain hydrogels and fibers having higher strength. It is.

【0007】又、側鎖に親水性の水酸基を有することか
ら繊維およびフィルムの耐水性や吸湿性の問題点も指摘
されている。
Further, it has been pointed out that the fibers and films have problems of water resistance and hygroscopicity due to having a hydrophilic hydroxyl group in a side chain.

【0008】ポリビニルアルコールの繊維およびハイド
ロゲルにおいて明らかな強度の分子量依存性が認められ
ないのは、ポリビニルアルコールの分子量を高めると側
鎖の水酸基間の水素結合が強くなり、また水素結合が強
くなることにより繊維の延伸性を阻害するためと考えら
れる。
[0008] The apparent lack of molecular weight dependence of strength in polyvinyl alcohol fibers and hydrogels is the reason that increasing the molecular weight of polyvinyl alcohol increases the strength of hydrogen bonds between hydroxyl groups in the side chains and the hydrogen bonds. It is considered that this would impair the drawability of the fiber.

【0009】我々は高分子量ポリビニルアルコールの側
鎖における水酸基間の水素結合を一部阻害し、より高い
機械的強度を有するハイドロゲルを得るための研究を行
った。
We have studied to obtain a hydrogel having higher mechanical strength by partially inhibiting hydrogen bonding between hydroxyl groups in the side chain of high molecular weight polyvinyl alcohol.

【0010】高重合度ポリビニルアルコールの側鎖間の
水素結合を阻害する方法として、ポリビニルアルコール
中に水素結合を阻害する物質の添加を試みた。その物質
としてポリビニルアルコールと親和性があり、比較的高
い弾性率を有する繊維を得ることのできるエチレン−ビ
ニルアルコール共重合体に着目し研究を行った。
As a method of inhibiting hydrogen bonds between side chains of polyvinyl alcohol having a high degree of polymerization, an attempt was made to add a substance which inhibits hydrogen bonds to polyvinyl alcohol. The research focused on an ethylene-vinyl alcohol copolymer which has an affinity for polyvinyl alcohol as a substance and can obtain fibers having a relatively high elastic modulus.

【0011】我々はポリビニルアルコールとエチレン−
ビニルアルコール共重合体の混合物を共通溶媒に完全に
溶解させた後、その溶液の室温または低温でのゲル化を
試みた。その結果、得られたハイドロゲルは高含水率で
高強度を示し、本願発明に至った。
[0011] We use polyvinyl alcohol and ethylene-
After completely dissolving the mixture of the vinyl alcohol copolymer in the common solvent, an attempt was made to gel the solution at room temperature or at low temperature. As a result, the obtained hydrogel exhibited a high water content and a high strength, leading to the present invention.

【0012】コンポジットハイドロゲルの機械的特性は
エチレン−ビニルアルコール共重合体の混合比に依存
し、エチレン−ビニルアルコール共重合体を混合するこ
とによりポリビニルアルコール単独から作製したハイド
ロゲルより機械的特性に優れたハイドロゲルが得られる
ことを見いだした。
The mechanical properties of the composite hydrogel depend on the mixing ratio of the ethylene-vinyl alcohol copolymer. By mixing the ethylene-vinyl alcohol copolymer, the mechanical properties are better than those of the hydrogel prepared from polyvinyl alcohol alone. It has been found that an excellent hydrogel can be obtained.

【0013】最も高い強度を有するハイドロゲルが得ら
れるエチレン−ビニルアルコール共重合体の混合比は用
いたポリビニルアルコールの重合度に依存し、ポリビニ
ルアルコールの重合度の増大とともに高濃度側にシフト
した。
The mixing ratio of the ethylene-vinyl alcohol copolymer from which the hydrogel having the highest strength is obtained depends on the degree of polymerization of the polyvinyl alcohol used, and shifts to the higher concentration side as the degree of polymerization of the polyvinyl alcohol increases.

【0014】また、ハイドロゲルの強度は用いたエチレ
ン−ビニルアルコール共重合体の種類に依存し、混合す
るエチレン−ビニルアルコール共重合体の共重合組成を
変化させることによりハイドロゲルの機械的特性を変化
させることができた。
The strength of the hydrogel depends on the type of the ethylene-vinyl alcohol copolymer used, and the mechanical properties of the hydrogel are changed by changing the copolymer composition of the ethylene-vinyl alcohol copolymer to be mixed. Could be changed.

【0015】ハイドロゲルを作製した後、得られたハイ
ドロゲルを乾燥させることにより、容易にフィルム、繊
維、およびチューブを作製することができた。得られた
フィルム、繊維、およびチューブのDSC測定ではピー
クか一つしか認められず、コンポジット内で相分離が生
じていないことが確認できた。
After preparing the hydrogel, the obtained hydrogel was dried to easily prepare films, fibers, and tubes. Only one peak was observed in the DSC measurement of the obtained film, fiber, and tube, and it was confirmed that no phase separation occurred in the composite.

【0016】完全に溶解した溶液をメタノールのような
貧溶媒中に押し出すことによりコンポジットフィルム、
繊維、およびチューブ等の成形品を容易に作製すること
ができる。また、それらのDSC測定ではピークが一つ
しか認められず、均一な構造を持ったコンポジット成形
物の作製が可能であった。
By extruding the completely dissolved solution into a poor solvent such as methanol,
Molded articles such as fibers and tubes can be easily produced. In addition, only one peak was observed in those DSC measurements, and it was possible to produce a composite molded article having a uniform structure.

【0017】[0017]

【実施例】以下に実施例を示し本願発明を詳細に説明す
る。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments.

【0018】[0018]

【実施例1】重合度が5,000、ケン化度が99.5
mol%のポリビニルアルコール(PVA)と重合度が
1,040、エチレン含量27mol%およびケン化度
が99.5mol%のエチレン−ビニルアルコール共重
合体(EVA−1)を用い、種々の混合比のPVA/E
VA−1混合物を水/ジメチルスルホキシド(DMS
O)=2/8の混合溶媒に高温にて溶解させた後、−2
0℃にて24時間放置し、ゲルを得た。そのゲルを水中
に放置し、DMSOを水と置換させることによりハイド
ロゲルを作製した。ハイドロゲルの強度を引張り試験機
にて測定した。溶液濃度は6wt%であった。
Example 1 The degree of polymerization was 5,000 and the degree of saponification was 99.5.
mol% of polyvinyl alcohol (PVA) and an ethylene-vinyl alcohol copolymer (EVA-1) having a polymerization degree of 1,040, an ethylene content of 27 mol% and a saponification degree of 99.5 mol%. PVA / E
The VA-1 mixture was treated with water / dimethylsulfoxide (DMS
O) = 2/8 after being dissolved in a mixed solvent at a high temperature,
It was left at 0 ° C. for 24 hours to obtain a gel. The gel was left in water, and DMSO was replaced with water to prepare a hydrogel. The strength of the hydrogel was measured with a tensile tester. The solution concentration was 6% by weight.

【0019】[0019]

【図1】FIG.

【0020】得られたハイドロゲルの強度および伸度は
EVA−1の濃度に依存し、EVA−1濃度が10wt
%で最も高い値を示した。
The strength and elongation of the obtained hydrogel depend on the concentration of EVA-1.
% Showed the highest value.

【0021】[0021]

【実施例2】重合度が8,800、ケン化度が99.5
mol%のPVAとEVA−1を用い、種々の混合比の
PVA/EVA−1混合物を水/DMSO=2/8の混
合溶媒に高温にて溶解させた後、−20℃にて24時間
放置し、ゲルを得た。そのゲルを水中に放置し、DMS
Oを水と置換させることによりハイドロゲルを作製し
た。ハイドロゲルの強度を引張り試験機にて測定した。
溶液濃度は4wt%であった。
Example 2 The degree of polymerization was 8,800 and the degree of saponification was 99.5.
Using a mol% of PVA and EVA-1, a PVA / EVA-1 mixture having various mixing ratios was dissolved in a mixed solvent of water / DMSO = 2/8 at a high temperature, and then left at −20 ° C. for 24 hours. Then, a gel was obtained. The gel is left in water and DMS
A hydrogel was prepared by replacing O with water. The strength of the hydrogel was measured with a tensile tester.
The solution concentration was 4% by weight.

【0022】[0022]

【図2】FIG. 2

【0023】重合度が8,800のPVAにおいてもハ
イドロゲルの強度はEVA−1の混合比に依存した。ま
た、EVA−1濃度が40wt%で強度および伸度は最
も高い値を示した。
Even with PVA having a degree of polymerization of 8,800, the strength of the hydrogel was dependent on the mixing ratio of EVA-1. The strength and elongation showed the highest values when the EVA-1 concentration was 40 wt%.

【0024】[0024]

【実施例3】重合度が5,000、ケン化度が99.5
mol%のPVAと重合度が1,030、エチレン含量
20mol%およびケン化度が99.5mol%のエチ
レン−ビニルアルコール共重合体(EVA−2)を用
い、種々の混合比のPVA/EVA−2混合物を水/D
MSO=2/8の混合溶媒に高温にて溶解させた後、−
20℃にて24時間放置し、ゲルを得た。そのゲルを水
中に放置し、DMSOを水と置換させることによりハイ
ドロゲルを作製した。ハイドロゲルの強度を引張り試験
機にて測定した。溶液濃度は6wt%であった。
Example 3 The degree of polymerization was 5,000 and the degree of saponification was 99.5.
mol% of PVA and an ethylene-vinyl alcohol copolymer (EVA-2) having a polymerization degree of 1,030, an ethylene content of 20 mol%, and a saponification degree of 99.5 mol%, and various mixing ratios of PVA / EVA- 2 mixture with water / D
After dissolving at a high temperature in a mixed solvent of MSO = 2/8,
It was left at 20 ° C. for 24 hours to obtain a gel. The gel was left in water, and DMSO was replaced with water to prepare a hydrogel. The strength of the hydrogel was measured with a tensile tester. The solution concentration was 6% by weight.

【0025】[0025]

【図3】FIG. 3

【0026】エチレン含量が20mol%のEVA2に
おいてもハイドロゲルの強伸度はEVA2の濃度に依存
し、EVA2の濃度が20wt%で最も高い強度を示し
た。
Even in the case of EVA2 having an ethylene content of 20 mol%, the strength and elongation of the hydrogel depend on the concentration of EVA2, and the highest strength was exhibited when the concentration of EVA2 was 20 wt%.

【0027】[0027]

【実施例4】重合度が1,700、ケン化度が99.5
mol%PVAを用いてPVA/EVA−1=90/1
0の混合混合物を水/DMSO=2/8の混合溶媒に溶
解させた溶液を硝子板上に流し込んだ後、−20℃で2
4時間放置した。得られたゲルフィルムを乾燥させるこ
とによりPVA/EVA−1コンポジットフィルムを作
製し、フィルムのDSC測定を行った。溶液濃度は10
wt%であった。
Example 4 The degree of polymerization was 1,700 and the degree of saponification was 99.5.
PVA / EVA-1 = 90/1 using mol% PVA
0 was dissolved in a mixed solvent of water / DMSO = 2/8, and a solution was poured onto a glass plate.
Left for 4 hours. The PVA / EVA-1 composite film was prepared by drying the obtained gel film, and the DSC measurement of the film was performed. Solution concentration is 10
wt%.

【0028】[0028]

【図4】FIG. 4

【0029】[0029]

【実施例5】重合度が8,800、ケン化度が99.5
mol%のポリビニルアルコール(PVA)とEVA−
1を用い、PVA/EVA−1=60/40の混合物を
水/DMSO=2/8の混合溶媒に高温にて溶解させた
後、0.6mmの直径を有するノズルから−20℃のメ
タノール中に押し出し乾湿式法により繊維を得た。その
繊維のDSC測定を行った。溶液濃度は4wt%であっ
た。
Example 5 The degree of polymerization was 8,800 and the degree of saponification was 99.5.
mol% of polyvinyl alcohol (PVA) and EVA-
1, a mixture of PVA / EVA-1 = 60/40 was dissolved at a high temperature in a mixed solvent of water / DMSO = 2/8, and then a methanol having a diameter of 0.6 mm was used. To obtain fibers by a dry-wet method. A DSC measurement of the fiber was performed. The solution concentration was 4% by weight.

【0030】[0030]

【図5】FIG. 5

【0031】得られた繊維の臨解曲線は235℃付近に
一つのピークしか観察されなかった。又得られた繊維の
延伸を高温で行ったところ30倍以上の延伸が可能であ
った。
The solution curve of the obtained fiber showed only one peak around 235 ° C. When the obtained fiber was stretched at a high temperature, it could be stretched 30 times or more.

【0032】[0032]

【発明の効果】本発明により従来のPVAハイドロゲル
より機械的特性に優れたハイドロゲルを得ることができ
た。また、融点が一つしか存在しないコンポジットフィ
ルム、繊維、およびチューブを得ることができ、高強度
・高弾性率繊維等への応用が可能である。
According to the present invention, a hydrogel having more excellent mechanical properties than a conventional PVA hydrogel can be obtained. In addition, composite films, fibers, and tubes having only one melting point can be obtained, and can be applied to high-strength, high-modulus fibers and the like.

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成9年1月8日[Submission date] January 8, 1997

【手続補正2】[Procedure amendment 2]

【補正対象書類名】明細書[Document name to be amended] Statement

【補正対象項目名】図面の簡単な説明[Correction target item name] Brief description of drawings

【補正方法】追加[Correction method] Added

【補正内容】[Correction contents]

【図面の簡単な説明】[Brief description of the drawings]

【図1】 重合度が5、000、ケン化度が99.5m
ol%のポリビニルアルコールと重合度が1、040、
エチレン含量が27mol%およびケン化度が99.5
mol%のエチレンービニルアルコール共重合体より作
製した複合体ハイドロゲルの混合比に対する強伸度の変
化。 左縦軸 ; ハイドロゲルの強度 (kg/cm) 右縦軸 ; ハイドロゲルの伸度 (%) 横軸 ; PVA/EVAの混合比 (重量) PVA ; ポリビニルアルコール EVA ; エチレンービニルアルコール共重合体
FIG. 1 shows a polymerization degree of 5,000 and a saponification degree of 99.5 m.
ol% of polyvinyl alcohol and a polymerization degree of 1,040,
Ethylene content of 27 mol% and degree of saponification of 99.5
Changes in the elongation with respect to the mixing ratio of the composite hydrogel prepared from a mol% ethylene-vinyl alcohol copolymer. Left vertical axis: Hydrogel strength (kg / cm 2 ) Right vertical axis: Hydrogel elongation (%) Horizontal axis: PVA / EVA mixing ratio (weight) PVA: Polyvinyl alcohol EVA: Ethylene-vinyl alcohol copolymer Coalescence

【図2】 重合度が8、800、ケン化度が99.5m
ol%のポリビニルアルコールと重合度が1、040、
エチレン含量が27mol%およびケン化度が99.5
mol%のエチレンービニルアルコール共重合体より作
製した複合体ハイドロゲルの混合比に対する強伸度の変
化。 左縦軸 ; ハイドロゲルの強度 (kg/cm) 右縦軸 ; ハイドロゲルの伸度 (%) 横軸 ; PVA/EVAの混合比 (重量) PVA ; ポリビニルアルコール EVA ; エチレンービニルアルコール共重合体
FIG. 2 shows a polymerization degree of 8,800 and a saponification degree of 99.5 m.
ol% of polyvinyl alcohol and a polymerization degree of 1,040,
Ethylene content of 27 mol% and degree of saponification of 99.5
Changes in the elongation with respect to the mixing ratio of the composite hydrogel prepared from a mol% ethylene-vinyl alcohol copolymer. Left vertical axis: Hydrogel strength (kg / cm 2 ) Right vertical axis: Hydrogel elongation (%) Horizontal axis: PVA / EVA mixing ratio (weight) PVA: Polyvinyl alcohol EVA: Ethylene-vinyl alcohol copolymer Coalescence

【図3】 重合度が5、000、ケン化度が99.5m
ol%のポリビニルアルコールと重合度が1、030、
エチレン含量が20mol%およびケン化度が99.5
mol%のエチレンービニルアルコール共重合体より作
製した複合体ハイドロゲルの混合比に対する強伸度の変
化。 左縦軸 ; ハイドロゲルの強度 (kg/cm) 右縦軸 ; ハイドロゲルの伸度 (%) 横軸 ; PVA/EVAの混合比 (重量) PVA ; ポリビニルアルコール EVA ; エチレンービニルアルコール共重合体
FIG. 3 shows a degree of polymerization of 5,000 and a degree of saponification of 99.5 m.
ol% of polyvinyl alcohol and a polymerization degree of 1,030,
Ethylene content of 20 mol% and degree of saponification of 99.5
Changes in the elongation with respect to the mixing ratio of the composite hydrogel prepared from a mol% ethylene-vinyl alcohol copolymer. Left vertical axis: Hydrogel strength (kg / cm 2 ) Right vertical axis: Hydrogel elongation (%) Horizontal axis: PVA / EVA mixing ratio (weight) PVA: Polyvinyl alcohol EVA: Ethylene-vinyl alcohol copolymer Coalescence

【図4】 重合度が5、000、ケン化度が99.5m
ol%のポリビニルアルコールと重合度が1、040、
エチレン含量が27mol%およびケン化度が99.5
mol%のエチレンービニルアルコール共重合体より作
製した混合比が60/40(重量)の乾燥複合体ハイド
ロゲルの示差熱走査熱量測定の結果。 横軸 ; 温度 (℃) 縦軸 ; 吸・発熱量 (mW)
FIG. 4 shows a polymerization degree of 5,000 and a saponification degree of 99.5 m.
ol% of polyvinyl alcohol and a polymerization degree of 1,040,
Ethylene content of 27 mol% and degree of saponification of 99.5
The result of a differential scanning calorimetry of a dried composite hydrogel having a mixing ratio of 60/40 (weight) prepared from a mol% ethylene-vinyl alcohol copolymer. Horizontal axis: Temperature (° C) Vertical axis: Absorption / heat generation (mW)

【図5】 重合度が8,800、ケン化度が99.5m
ol%のポリビニルアルコールと重合度が1、040、
エチレン含量が27mol%およびケン化度が99.5
mol%のエチレンービニルアルコール共重合体を用
い、混合比が60/40(重量)の混合物を水/ジメチ
ルスルホキシド=2/8の混合溶媒に高温にて溶解させ
た後、0.6mmの直径を有するノズルから−20℃の
メタノール中に押し出した乾湿式紡糸法により得た未延
伸繊維の示差熱走査熱量測定の結果。 横軸 ; 温度 (℃) 縦軸 ; 吸・発熱量 (mW)
FIG. 5 shows a polymerization degree of 8,800 and a saponification degree of 99.5 m.
ol% of polyvinyl alcohol and a polymerization degree of 1,040,
Ethylene content of 27 mol% and degree of saponification of 99.5
After dissolving a mixture having a mixing ratio of 60/40 (weight) in a mixed solvent of water / dimethyl sulfoxide = 2/8 at a high temperature using a mol% ethylene-vinyl alcohol copolymer, a diameter of 0.6 mm was obtained. The results of differential thermal scanning calorimetry of undrawn fibers obtained by a dry-wet spinning method extruded into methanol at −20 ° C. from a nozzle having the following formula: Horizontal axis: Temperature (° C) Vertical axis: Absorption / heat generation (mW)

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI C08K 5/3445 C08K 5/3445 5/41 5/41 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code FI C08K 5/3445 C08K 5/3445 5/41 5/41

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 ポリビニルアルコールとエチレン−ビニ
ルアルコール共重合体の共通溶媒にポリビニルアルコー
ルとエチレン−ビニルアルコール共重合体の混合物を溶
解させて得られる溶液、あるいはそれぞれのポリマーを
共通溶媒に別々に溶解させた後、その溶液を混合した溶
液から得られるポリビニルアルコール/エチレン−ビニ
ルアルコール共重合体のコンポジット。
A solution obtained by dissolving a mixture of polyvinyl alcohol and an ethylene-vinyl alcohol copolymer in a common solvent of polyvinyl alcohol and an ethylene-vinyl alcohol copolymer, or separately dissolving each polymer in a common solvent. After that, a composite of a polyvinyl alcohol / ethylene-vinyl alcohol copolymer obtained from a solution obtained by mixing the solutions.
【請求項2】 ポリビニルアルコールおよびエチレン−
ビニルアルコール共重合体の共通溶媒としてジメチルス
ルホキシド、エチレングリコール、1,3−ジメチル−
2−イミダゾリジノンあるいはグリセリンのような単独
有機溶媒または水/ジメチルスルホキシド、水/グリセ
リン、水/1,3−ジメチル−2−イミダゾリジノンあ
るいは水/エチレングリコールのような水/有機溶媒混
合溶媒を用いて得られる請求項1記載のポリビニルアル
コール/エチレン−ビニルアルコール共重合体のコンポ
ジットの製造法。
2. Polyvinyl alcohol and ethylene-
Dimethyl sulfoxide, ethylene glycol, 1,3-dimethyl- as a common solvent for the vinyl alcohol copolymer
Single organic solvent such as 2-imidazolidinone or glycerin or mixed solvent of water / organic solvent such as water / dimethyl sulfoxide, water / glycerin, water / 1,3-dimethyl-2-imidazolidinone or water / ethylene glycol The method for producing a polyvinyl alcohol / ethylene-vinyl alcohol copolymer composite according to claim 1, which is obtained using
【請求項3】 混合物中のエチレン−ビニルアルコール
共重合体の比率が0から80wt%の混合比により得ら
れるコンポジットゲル、コンポジットフィルム、コンポ
ジット繊維、およびコンポジットチューブ。
3. A composite gel, a composite film, a composite fiber, and a composite tube, wherein the ratio of the ethylene-vinyl alcohol copolymer in the mixture is from 0 to 80% by weight.
JP8275181A 1996-09-10 1996-09-10 Composite of polyvinyl alcohol/ethylene-vinyl alcohol copolymer Pending JPH10306191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8275181A JPH10306191A (en) 1996-09-10 1996-09-10 Composite of polyvinyl alcohol/ethylene-vinyl alcohol copolymer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8275181A JPH10306191A (en) 1996-09-10 1996-09-10 Composite of polyvinyl alcohol/ethylene-vinyl alcohol copolymer

Publications (1)

Publication Number Publication Date
JPH10306191A true JPH10306191A (en) 1998-11-17

Family

ID=17551811

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8275181A Pending JPH10306191A (en) 1996-09-10 1996-09-10 Composite of polyvinyl alcohol/ethylene-vinyl alcohol copolymer

Country Status (1)

Country Link
JP (1) JPH10306191A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100639559B1 (en) 2005-03-15 2006-10-30 이동권 EVOH Blending Composition for Improvement of Process-ability
JP2008531769A (en) * 2005-02-23 2008-08-14 ズィマー・テクノロジー・インコーポレーテッド Blend hydrogel and method for producing the same
EP2253448A1 (en) * 2001-01-22 2010-11-24 Kuraray Co., Ltd. Method for producing ethylene-vinyl alcohol copolymer resin composition
JP2019503767A (en) * 2015-12-22 2019-02-14 アクセス・バスキュラー・インコーポレイテッドAccess Vascular, Inc. High strength biomaterial
CN114634665A (en) * 2022-03-02 2022-06-17 国家电投集团氢能科技发展有限公司 Vinyl polymer/modified polyhydroxy polymer composites and uses thereof
US11577008B2 (en) 2017-06-21 2023-02-14 Access Vascular, Inc. High strength porous materials incorporating water soluble polymers

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61252261A (en) * 1985-05-01 1986-11-10 Bio Materiaru Yunibaasu:Kk Porous transparent polyvinyl alcohol gel and production thereof
JPS63152407A (en) * 1986-11-17 1988-06-24 デーエスエム・ナムローゼ・フェンノートシャップ Ethylene/vinyl alcohol copolymer product having high strength and modulus and its production
JPH02242842A (en) * 1989-03-16 1990-09-27 Biomaterial Universe Kk Production of pva hydrogel
JPH05245138A (en) * 1992-03-03 1993-09-24 Terumo Corp Production of polyvinyl alcohol gel for ultrasonic medium
JPH07118929A (en) * 1993-10-22 1995-05-09 Kuraray Co Ltd Polyvinyl alcohol fiber having water resistance and thermocompression bonding character

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61252261A (en) * 1985-05-01 1986-11-10 Bio Materiaru Yunibaasu:Kk Porous transparent polyvinyl alcohol gel and production thereof
JPS63152407A (en) * 1986-11-17 1988-06-24 デーエスエム・ナムローゼ・フェンノートシャップ Ethylene/vinyl alcohol copolymer product having high strength and modulus and its production
JPH02242842A (en) * 1989-03-16 1990-09-27 Biomaterial Universe Kk Production of pva hydrogel
JPH05245138A (en) * 1992-03-03 1993-09-24 Terumo Corp Production of polyvinyl alcohol gel for ultrasonic medium
JPH07118929A (en) * 1993-10-22 1995-05-09 Kuraray Co Ltd Polyvinyl alcohol fiber having water resistance and thermocompression bonding character

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2253448A1 (en) * 2001-01-22 2010-11-24 Kuraray Co., Ltd. Method for producing ethylene-vinyl alcohol copolymer resin composition
JP2008531769A (en) * 2005-02-23 2008-08-14 ズィマー・テクノロジー・インコーポレーテッド Blend hydrogel and method for producing the same
KR100639559B1 (en) 2005-03-15 2006-10-30 이동권 EVOH Blending Composition for Improvement of Process-ability
JP2019503767A (en) * 2015-12-22 2019-02-14 アクセス・バスキュラー・インコーポレイテッドAccess Vascular, Inc. High strength biomaterial
US11389570B2 (en) 2015-12-22 2022-07-19 Access Vascular, Inc. High strength biomedical materials
US11577008B2 (en) 2017-06-21 2023-02-14 Access Vascular, Inc. High strength porous materials incorporating water soluble polymers
CN114634665A (en) * 2022-03-02 2022-06-17 国家电投集团氢能科技发展有限公司 Vinyl polymer/modified polyhydroxy polymer composites and uses thereof

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