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Polyurethane elastomers based on amphiphilic poly(caprolactone)‐b‐poly(butadiene)‐b‐poly(caprolactone) triblockcopolyols
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2018-03-31 , DOI: 10.1002/pola.29001 Irina Fink 1 , Berend Eling 2 , Elmar Pöselt 2 , Gerrit A. Luinstra 1
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2018-03-31 , DOI: 10.1002/pola.29001 Irina Fink 1 , Berend Eling 2 , Elmar Pöselt 2 , Gerrit A. Luinstra 1
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Hydroxyl‐terminated poly(butadiene) (HTPB; Mn = 2100 g mol−1) was capped with 30 and 60 wt % of ɛ‐caprolactone to reach amphiphilic triblock copolymers in form of capped poly(butadiene) CPB. The former (CPB30; Mn = 3300 g/mol) is amorphous with a glass temperature of −56 °C. CPB60 (Mn = 4000 g mol−1) is semi‐crystalline with a melting point of 50 °C and a glass transition at −47 °C. The CPBs, HTPB and polycaprolactone diol (Mn = 2000 g mol−1) were used as soft segment components in the preparation of polyurethane elastomers (PUE), using a 1/1 mixture of an MDI prepolymer and uretonimine modified MDI, and hard phase components in form of 1,3‐propane diol, 1,4‐butane diol, and 1,5‐pentane diol. CPB‐based elastomers with 1,4 butane diol (8 wt %) show hard domains as fringed aggregates with a better connection to the continuous phase than the HTPB‐based PUE. The soft segment glass transition temperature (Tg) is at −28 °C for HTPB‐based PUE and at −43 °C for those of CPB. The tensile strength of the CPB30&60‐based PUE is found between 20 and 30 MPa at an elongation at break of 400% and 550%, respectively. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1162–1172
中文翻译：
基于两亲性聚己内酯-b-聚丁二烯-b-聚己内酯三嵌段共聚多元醇的聚氨酯弹性体
用30和60 wt％的ε-己内酯封端羟基封端的聚丁二烯（HTPB; M n = 2100 g mol -1），以封端的聚丁二烯CPB形式形成两亲三嵌段共聚物。前者（CPB30;中号Ñ =3300克/摩尔）是无定形的与-56的玻璃温度℃。CPB60（M n = 4000 g mol -1）是半结晶的，熔点为50°C，在-47°C时发生玻璃化转变。CPB，HTPB和聚己内酯二醇（M n = 2000 g mol -1）用作聚氨酯弹性体（PUE）的软链段组分，使用MDI预聚物和脲酮亚胺改性的MDI的1/1混合物以及1,3-丙二醇，1,4-丁二醇和1,5-戊二醇。具有1,4丁二醇（8 wt％）的基于CPB的弹性体显示为硬质结构，为带状聚集体，与基于HTPB的PUE相比，与连续相的连接性更好。对于基于HTPB的PUE，软段玻璃化转变温度（T g）为-28°C，对于CPB则为-43°C。基于CPB30＆60的PUE的拉伸强度分别在20和30 MPa之间，断裂伸长率分别为400％和550％。©2018 Wiley Periodicals，Inc.J.Polym。科学，A部分：Polym。化学 2018，56，1162–1172
更新日期：2018-03-31
中文翻译：
基于两亲性聚己内酯-b-聚丁二烯-b-聚己内酯三嵌段共聚多元醇的聚氨酯弹性体
用30和60 wt％的ε-己内酯封端羟基封端的聚丁二烯（HTPB; M n = 2100 g mol -1），以封端的聚丁二烯CPB形式形成两亲三嵌段共聚物。前者（CPB30;中号Ñ =3300克/摩尔）是无定形的与-56的玻璃温度℃。CPB60（M n = 4000 g mol -1）是半结晶的，熔点为50°C，在-47°C时发生玻璃化转变。CPB，HTPB和聚己内酯二醇（M n = 2000 g mol -1）用作聚氨酯弹性体（PUE）的软链段组分，使用MDI预聚物和脲酮亚胺改性的MDI的1/1混合物以及1,3-丙二醇，1,4-丁二醇和1,5-戊二醇。具有1,4丁二醇（8 wt％）的基于CPB的弹性体显示为硬质结构，为带状聚集体，与基于HTPB的PUE相比，与连续相的连接性更好。对于基于HTPB的PUE，软段玻璃化转变温度（T g）为-28°C，对于CPB则为-43°C。基于CPB30＆60的PUE的拉伸强度分别在20和30 MPa之间，断裂伸长率分别为400％和550％。©2018 Wiley Periodicals，Inc.J.Polym。科学，A部分：Polym。化学 2018，56，1162–1172
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