相關標簽：道達爾(美國) PP、意大利Taroplas PC/PBT、俄羅斯NKNKh HIPS塑料原料、低萃取物 PFE、鋅的離聚物 離聚物、耐臭氧性能 未指定塑料原料
PBT是對苯二甲酸與丁二醇的縮聚產物。可以用直接酯化法和酯交換法制備。PBT的分子鏈結構與PET極為相似，亦是由剛性亞苯基、柔性脂肪烴基和極性酯基所組成。與PET所不同的是，PBT中的柔性脂肪烴基較長，因此，PBT中的柔性因素影響較PET中大一些，PBT比PET的剛性要小些，玻璃化溫度和熔融溫度要低^;PBT的結晶速率較PET大，結晶度會較高。
(1)PBT的常用特性PBT為乳白色結晶型固體，密度可在13l1.55g/cm3之間變化，其值與結晶度有很大關系，PBT具有極好的耐老化性，在12CTC下經4年以上的老化，其彎曲強度仍保持在50%以上，未增強的PBT力學性能與其他工程塑料相比，并沒有明顯的優勢，但用玻纖增強后，其力學性能得到成倍增長，增強效果要超過許多工程塑料。目前，PBT中有80%以上經過改性后使用，且多是用玻璃纖維增強的。
經過改性的PBT性能十分突出，它的耐熱性優良，可在120t下長期使用，短期使用溫度在200°C左右；機械強度髙，其沖擊強度從低溫到髙溫時變化很小，有優異的耐蠕變性；吸水率低，尺寸穩定性好，耐摩擦、磨耗性優良；有較好的阻燃性，耐化學藥品性優良；PBT與其他改性工程塑料相比，其成型流動性良好，可制得厚度較薄的塑件；它的電性能優良，即使在溫度、濕度變化范圍很廣的情況下，其電性能仍能基本保持不變。由于改性PBT的性能大為改善和提髙，因此，改性PBT應用較多。
(2)PBT的主要用途PBT于1970年才問世，但是由于它有優良的綜合性能，因而得到了廣泛地應用。PBT以其優良的力學性能取代了很多金屬材料，在電子、電器、汽車、機械設備、精密儀器等方面應用很廣，如可制作電風扇、咖啡器皿外殼、電熱器殼體、吸塵器元件等家用電器；也可制作電動機殼體、電器開關、保險絲盒、計算機鍵盤按鍵等電器元件；還可制作汽車車身嵌板、午:輪蓋、散熱器格窗、門窗部件等零部件。 。以上文獻若需轉載請備注出處：pbt塑料 //shanglikaiguan.cn/
| 其它 纖維 其它 | |
| 適合纖維、復絲用 | |
| 性能項目 | 試驗條件[狀態] | 測試方法 | 測試數據 | |
| 熔融指數 | 2.5 | |||
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