SBS及SBS/PS合膠經硫化交聯之破壞強度研究

Fracture energies of SBS and SBS/PS blends crosslinked by sulfur

董士德(shr-de doong)

指導教授 ： 王紀

元智大學/工程學院/化學工程與材料科學學系/碩士(1997年)

摘要

摘要

用mixer混練的方法，將SBS加入不同比例的硫，並用熱壓使硫與SBS
中的PB鏈斷起交聯作用。實驗上使用切割及撕裂測試兩種方法，研究不同
配方交聯的SBS破壞強度，並用拉伸測試，瞭解不同含硫量對SBS楊氏係數
的影響。找出最適當的配方以增進SBS在高溫中的強度，並使其仍保有流
動性。
SBS中摻入PS形成SBS/PS合膠並比較與相同含硫量的SBS配方破壞能量的差
別；同時在SBS/PS合膠系統中，比較經動態交聯與靜態交聯後的樣品破壞
能量的差異性。研究溫度、速度對破壞能量之影響。
實驗結果發現：溫度對破壞能量的影響相當明顯。速度對破壞能量的影響
，在室溫下並不顯著，在高溫時速度越快則破壞能量越大。摻入PS的合膠
系統，在室溫下的確有補強SBS破壞能量的效果，且在高溫時依然有強度
存在。

關鍵字

破壞強度 ； 撕裂強度 ； 切割強度 ； 混料

並列摘要

Abstract
Brabender internal mixer was used to prepare melt mixtures
of SBS copolymers with different amount of sulfur. Crosslinking
was carried out using compression molding at 160℃for one hour.
Similar procedure was applied for the SBS/PS blends. Effects of
crosslinking density and content on the fracture energy,
determined from tearing and cutting methods, were investigated.
In this research, DSC was used to reveal the glass transition
temperature of PB phase. The molecular weight between physical
or chemical crosslinking points were determined from swelling
method or equilibrium stress-strain method, respectively.
The factors which might affect the fracture energy were
investigated including: temperature, rate, sulfur content,
polystyrene, and vulcanization type, either dynamic or static.
General trends of microstructure-strength relations were
provided at the end.

並列關鍵字

fracture energies ； tearing ； cutting ； mixing

參考文獻

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