EFFECTS OF NUMBER-AVERAGE MOLECULAR-WEIGHT OF NETWORK CHAIN ON PHYSICAL-PROPERTIES OF CIS-POLYBUTADIENE-CONTAINING POLYURETHANE

NCU Institutional Repository > 工學院 > 化學工程與材料工程研究所 > 期刊論文 > Item 987654321/26726

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/26726

題名:	EFFECTS OF NUMBER-AVERAGE MOLECULAR-WEIGHT OF NETWORK CHAIN ON PHYSICAL-PROPERTIES OF CIS-POLYBUTADIENE-CONTAINING POLYURETHANE
作者:	CHEN,TK;HWUNG,CJ;HOU,CC
貢獻者:	化學工程與材料工程學系
關鍵詞:	MECHANICAL-PROPERTIES;ALIPHATIC DIOLS
日期:	1992
上傳時間:	2010-06-29 17:35:17 (UTC+8)
出版者:	中央大學
摘要:	Liquid hydroxyl-terminated cis-polybutadiene (cis-HTPB) having various molecular weights were cured with trimethylol propane (TMP) and isophorone diisocyanate (IPDI) by the one-shot method and the physical properties of these elastomers obtained were measured. The effect of pseudo-crosslinks was not observable and the calculated value of the number average molecular weight of the network chain (McBAR) between each TMP crosslink unit was found to be pertinent in determining the tensile strength, modulus, tear strength, and hardness. The mechanical properties increased with increase in the 1/McBAR value and showed a linear relationship with the high 1/McBAR values (McBAR below about 3000). On the other hand, chain entanglement becomes more important in affecting the mechanical properties when McBAR was higher than 3000, and physical properties were less dependent on 1/McBAR values in the lower range.
關聯:	POLYMER ENGINEERING AND SCIENCE
顯示於類別:	[化學工程與材料工程研究所] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	406	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing