不飽和聚酯樹脂硬化反應之靜態光散射研究

Static Light Scattering Study of the Curing Reaction of Unsaturated Polyester

陳正賜(Jehng-syh Chen)

指導教授 ： 余子隆

元智大學/工程學院/化學工程與材料科學學系/碩士(1996年)

摘要

不飽和聚酯樹脂是高分子材料中最被廣泛使用的熱固型樹脂，它提供
良好的物性、化性且價格低廉，在大部份的製造過程均可被加工處理。本
研究利用示差掃描熱分析儀(DSC)、靜態(SLS)及動態(DLS)光散射儀研究
不飽和聚酯樹脂在凝膠硬化前之形態學及與苯乙烯單體之相溶性。由DSC
可測得樹脂在不同硬化時間下硬化反應之趨勢及轉化率，而硬化反應初期
微膠粒子之粒徑、樹脂分子量及不飽和聚酯與苯乙烯單體相溶性變化可由
DLS和SLS測得。由實驗結果顯示由於intra-molecular和inter-molecular
反應之差異，不飽和聚酯樹脂在硬化反應初期不同硬化時間下微膠成形的
大小及結構之變化。而分子量則隨著硬化時間增加而有增加的趨勢。對於
不飽和聚酯與苯乙烯單體相溶性變化則是隨硬化時間增加而減少。

關鍵字

不飽和聚酯 ； 微膠 ； 二維係數 ； 靜態光散射 ； 動態光散射

並列摘要

Unsturated polyester resins are the most widely used
thermosets in the polymeric composites. They offer a good
physical and chemicalproperties, are relatively inexpensive, and
amendable to most fabricationprocesses. In this study, DSC,
static light(SLS), dynamic light scattering(DLS)were used to
studythe morphology and curing kinetics of partially
curedunsaturated polyester/styrene system and compatibility
between polyester and styrene before gelation. We can measure
the conversion of resins at the different curing time by DSC,
and the micro-gel particle size and itsmolecular weight and
compatibility betweenen polyester and styrene were obtained by
DLS and SLS. The results of experiment revealed that
thevariation of micro-gel particle size and structure in the
initial stage of curing. The polymer molecular weight increased
with curing time. The compatibility between polyester and
styrene monomer decreased with curing time.

並列關鍵字

DSC ； Unsaturated Polyester ； Microgel ； Second virial coefficient ； Static light scattering ； Dynamic light scattering ； DSC