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首页> 外文期刊>Journal of Applied Polymer Science >Novel polyisobutylene stars. XXIII. Thermal, mechanical, and processing characteristics of poly(phenylene ether)/polydivinylbenzene(polyisobutylene-b-polystyrene)(37) blends
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Novel polyisobutylene stars. XXIII. Thermal, mechanical, and processing characteristics of poly(phenylene ether)/polydivinylbenzene(polyisobutylene-b-polystyrene)(37) blends

机译：新型聚异丁烯星。二十三。聚苯醚/聚二乙烯基苯（聚异丁烯-b-聚苯乙烯）（37）共混物的热，机械和加工特性

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The objective of these investigations was to increase the use temperature of novel star-block polymers consisting of a crosslinked polydivinylbenzene (PDVB) core from which radiate multiple poly(isobutylene-b-polystyrene) (PIB-b-PSt) arms, abbreviated by PDVB(PIB-b-PSt)(n). We achieved this objective by blending star-blocks with poly(phenylene oxide) (PPO) that is miscible with PSt. Thus, various PPO/PDVB(PIB-b-PSt) blends were prepared, and their thermal, mechanical, and processing properties were investigated. The hard-phase glass-transition temperature of the blends could be controlled by the amount (wt%) of PPO. The blends displayed superior retention of tensile strengths at high temperatures as compared to star blocks. The melt viscosities of blends with low weight percentages of PPO were lower than those of star blocks. (C) 10928 Wiley Periodicals, Inc. [References: 16]
机译：这些研究的目的是提高新型星形嵌段聚合物的使用温度，该星形嵌段聚合物由交联的聚二乙烯基苯（PDVB）核组成，该核可辐射出多个聚（异丁烯-b-聚苯乙烯）（PIB-b-PSt）臂，缩写为PDVB （PIB-b-PSt）（n）。我们通过将星形嵌段与可与PSt混溶的聚苯醚（PPO）混合来实现此目标。因此，制备了各种PPO / PDVB（PIB-b-PSt）共混物，并研究了它们的热，机械和加工性能。共混物的硬相玻璃化温度可以通过PPO的量（wt％）来控制。与星形嵌段相比，该共混物在高温下显示出优异的拉伸强度保持性。具有低PPO重量百分比的共混物的熔体粘度低于星形嵌段的熔体粘度。 （C）10928 Wiley Periodicals，Inc. [参考：16]

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