KR20220004240A - 고강도 자가치유성 폴리우레탄 중합체 및 이를 포함하는 온도센서용 웹-필름 - Google Patents
고강도 자가치유성 폴리우레탄 중합체 및 이를 포함하는 온도센서용 웹-필름 Download PDFInfo
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Abstract
Description
도 2는 실시예 1의 외부응력에 의한 결정화 정도를 나타낸 사진 및 WAXS 패턴을 나타낸 도면이다.
도 3은 실시예 5의 자가치유성 웹-필름을 제조하는 전기방사 모식도이다.
도 4는 실시예 5 및 비교예 6의 자가치유성 웹-필름이 25 ℃에서 48시간 노출된 후의 투명도 변화를 나타낸 도면이다.
인장강도 (MPa) | 자가치유율 (%) | |
실시예 1 | 40 | 54 |
실시예 2 | 32 | 52 |
실시예 3 | 26 | 50 |
실시예 4 | 28 | 52 |
비교예 1 | 4 | 100 |
비교예 2 | 48 | 0 |
비교예 3 | 27 | 25 |
비교예 4 | 17 | 40 |
온도 센서 | 투과도 (%) | |
5 ℃ | 25℃ (48시간 노출) | |
실시예 5 | 0.5 | 21.0 |
실시예 6 | 0.5 | 18.7 |
비교예 5 | - | - |
비교예 6 | 0.2 | 0.5 |
비교예 7 | 85.2 | 85.1 |
Claims (19)
- 폴리카보네이트계 폴리올, 지환족 폴리이소시아네이트 및 지방족 폴리올으로부터 유래된 구조단위를 포함하는 자가치유성 폴리우레탄 중합체.
- 제 1항에 있어서,
상기 자가치유성 폴리우레탄 중합체는 폴리카보네이트계 폴리올 및 지환족 폴리이소시아네이트로부터 유래된 폴리우레탄 프리폴리머와 지방족 폴리올이 커플링하여 결합된 자가치유성 폴리우레탄 중합체. - 제 1항에 있어서,
상기 폴리카보네이트계 폴리올은 지방족 폴리카보네이트계 폴리올인 자가치유성 폴리우레탄 중합체. - 제 1항에 있어서,
상기 폴리카보네이트계 폴리올은 수평균분자량이 500 내지 5000 g/mol인 지방족 폴리카보네이트계 폴리올인 자가치유성 폴리우레탄 중합체. - 제 1항에 있어서,
상기 폴리카보네이트계 폴리올의 구조단위의 알킬렌기의 탄소수는 4 내지 10인 자가치유성 폴리우레탄 중합체. - 제 1항에 있어서,
상기 지방족 폴리올의 구조단위의 탄소수는 4 내지 6인 자가치유성 폴리우레탄 중합체. - 제 1항에 있어서,
상기 폴리카보네이트계 폴리올과 지방족 폴리올은 1: 0.02 내지 0.5 중량비인 자가치유성 폴리우레탄 중합체. - 제 2항에 있어서,
상기 폴리카보네이트계 폴리올 및 지환족 폴리이소시아네이트가 1: 1.5 내지 2.5 당량비인 폴리우레탄 프리폴리머이며, 상기 폴리우레탄 프리폴리머의 이소시아네이트기 및 지방족 폴리올의 수산화기의 당량비가 1: 0.5 내지 1.5 인 것인 자가치유성 폴리우레탄 중합체. - 제 1항에 있어서,
상기 자가치유성 폴리우레탄 중합체는 인장강도 25 MPa 이상이며, 하기 관계식 1을 만족하는 자가치유성 폴리우레탄 중합체.
[관계식 1]
50 ≤ T1/To * 100
(상기 관계식 1에서, To는 자가치유 폴리우레탄 중합체로 제조한 필름의 절단 전 35 ℃의 온도 조건에서 측정된 인성(MJ/m3)이며, T1은 자가치유 폴리우레탄 중합체로 제조한 필름을 절단하고 절단된 단면을 35 ℃의 온도조건에서 48시간동안 재 접합 후 측정된 인성(MJ/m3)이다. 상기 자가치유 폴리우레탄 중합체로 제조한 필름은 ISO 37-4 규격을 준수한 dumbbell 모양이며 두께는 1 mm이다.) - 제 1항 내지 9항에서 선택되는 어느 한 항의 자가치유성 폴리우레탄 중합체를 포함하는 다공성 자가치유성 폴리우레탄 물품.
- S1) 제 1항 내지 9항에서 선택되는 어느 한 항의 자가치유성 폴리우레탄 중합체를 유기용매에 용해시켜 자가치유성 폴리우레탄 용액으로 제조하는 단계;
S2) 상기 자가치유성 폴리우레탄 용액을 전기방사하여 미세섬유를 형성하는 단계; 및
S3) 상기 미세섬유로 이루어진 웹-필름을 수득하는 단계;
를 포함하는 자가치유성 웹-필름의 제조방법. - 제 11항에 있어서,
상기 전기방사는 응고욕 위에 전기방사하는 것인 자가치유성 웹-필름의 제조방법. - 제 11항에 있어서,
상기 응고욕은 물을 포함하며, 상기 응고욕 내에 집전판이 포함되어 수면 상에 전기방사하는 것인 자가치유성 웹-필름의 제조방법. - 제 1항 내지 9항에서 선택되는 어느 한 항의 자가치유성 폴리우레탄 중합체로 이루어진 복수개의 미세섬유를 포함하며, 상기 복수개의 미세섬유는 망상구조를 형성하는 자가치유성 웹-필름.
- 제 14항에 있어서,
상기 자가치유성 웹-필름은 380 내지 780 ㎚의 파장에서 광투과도가 25 % 이하인 불투명성 자가치유성 웹-필름. - 제 14항에 있어서,
상기 자가치유성 웹-필름은 10℃ 이상의 온도에서 온셋 포인트를 가지며, 상기 온셋 포인트에서 비가역적으로 상기 미세섬유들이 서로 자가융착하여 투명성이 증가하는 자가치유성 웹-필름. - 제 14항에 있어서,
상기 미세섬유는 용액 방사 또는 용융 방사하여 제조된 것인 자가치유성 웹-필름. - 제 14항에 있어서,
상기 자가치유성 웹-필름을 구성하는 미세 섬유의 평균 직경은 0.01 ㎛ 내지 200 ㎛ 인 것인 자가치유성 웹-필름. - 제 14항에 따른 자가치유성 웹-필름을 포함하는 온도센서.
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