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1. 发明授权

US4871816A Triblock polyarylene polyether with polysiloxane segment and impact-improved blends thereof 失效
标题翻译：具有聚硅氧烷链段的三嵌段聚亚芳基聚醚和其冲击改进的共混物
公开(公告)号：US4871816A
公开(公告)日：1989-10-03
申请号：US111317
申请日：1987-10-22
申请人： Virgil Percec , Paul P. Nicholas , Dana Garcia
发明人： Virgil Percec , Paul P. Nicholas , Dana Garcia
IPC分类号： C08F299/00 , C08G65/40 , C08G65/48 , C08G81/00 , C08L71/00
CPC分类号： C08G81/00 , C08F299/00 , C08G65/40 , C08G65/4012 , C08G65/48 , C08L71/00 , C08L2205/05
摘要： Polyarylene polyethers ("PAPE") with vinyl chain ends may be crosslinked to form networks with excellent physical and chemical properties except they tend to be brittle. In particular, a polysulfone ("PSU" made from bisphenol A and dichlorodiphenyl sulfone) with vinylbenzyl chain ends ("di-VB-PSU") is too brittle for many applications where impact resistance is essential. This brittleness is combatted by inserting a thermally stable rubbery poly(dimethylsiloxane) ("PDMS") segment having a number average molecular weight in the range from about 600 to about 5000 connected to di-VB-PSU segments by hydrosilylation in the presence of a Pt catalyst, to form a thermoplastic linear predominantly triblock oligomer with vinylbenzyl chain ends which are thermally crosslinkable. When crosslinked, the network formed has improved impact resistance and toughness, with only a little loss in the upper glass transition temperature if the relative lengths of the PDMS and PAPE are such as to provide the desired degree of phase microincompatibility sufficient to improve toughness. The triblock may be blended with a polymer with which the triblock may be crosslinked upon curing. If the VB-PSU-PDMS-PSU-VB triblock is blended with di-VB-PSU the polyblend may be crosslinked to provide improved toughness.
摘要翻译：具有乙烯基链末端的聚亚芳基聚醚（“PAPE”）可以交联以形成具有优异物理和化学性质的网络，除非它们易于脆化。具体地说，具有乙烯基苄基链端（“di-VB-PSU”）的聚砜（“双酚A和二氯二苯基砜制备的”PSU“）对于耐冲击性至关重要的许多应用来说太脆了。通过在存在下存在下通过氢化硅烷化插入数均分子量在约600至约5000的数均分子量的热稳定的橡胶状聚（二甲基硅氧烷）（“PDMS”）链段，来抵抗这种脆性。 Pt催化剂，以形成热塑性线性主要是三嵌段低聚物，其具有可热交联的乙烯基苄基链端。当交联时，所形成的网络具有改进的抗冲击性和韧性，如果PDMS和PAPE的相对长度能够提供足以提高韧性的所需程度的相微相容性，则在上玻璃化转变温度中仅有一点损失。三嵌段可以与固化时三嵌段可以交联的聚合物共混。如果将VB-PSU-PDMS-PSU-VB三嵌段与二-VP-PSU混合，则可将该共混物交联以提供改善的韧性。

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