本文以元素矽水解法合成不同奈米及次微米粒徑的二氧化矽當作擔體，經由表面改質劑(4-(Chloromethyl)phenyltrimethoxysilane)改質之後，再利用可逆加成-斷裂鏈轉移之活自由基聚合作用(RAFT)，在二氧化矽表面接枝高分子，形成無機/有機核殼型顆粒(CSP)，可當成不飽和聚酯、乙烯基酯及環氧樹酯的特殊添加劑，以改善熱固性樹脂基材之物性，如抗體積收縮性質及機械性質。
CSP的合成是以二氧化矽當做核心，再以具化學結構Z-C(=S)-S-R之RAFT鏈轉移劑3-Benzylsulfanylthiocarbonylsufanylpropionic Acid(BSPA)，接枝於先經苯甲氯表面改質後的二氧化矽(即Si-Cl)，形成接枝鏈轉移劑之二氧化矽(Si-BSPA)，再將Si-BSPA經由RAFT途徑聚合有機之丙烯酸甲酯單體，形成無機/有機核殼型顆粒(Si-PMA)。反應中的鏈轉移劑(BSPA)在RAFT聚合作用過程中會形成休眠基團，緩慢的進行聚合作用，可以控制接枝聚合物的分子量及分子量分佈，所得到之核殼顆粒之高分子外殼，並具活高分子(living polymer)之特性。

In the synthesis of the Si-PMA, the nano-scale colloidal silica was obtained by the hydrolysis of elemental silicon. Then silica was reacted with 4-(chloromethyl)phenyltrimethoxysilane to produce benzyl chloride functionalized silica(Si-Cl) first, followed by reacting with BSPA to make BSPA-grafted silica particle (Si-BSPA). Later, Si-BSPA can be use as a media in Si-poly(methyl acrylate)(i.e. Si-PMA) via Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerization.

During RAFT polymerization, the CTA will become a dormant specimen which made the polymerization slowly, so that the molecular weight and molecular weight distribution can be controlled. The Si-PMA has a characteristic of living polymer.

The synthesized Si-PMA, namely, inorganic/organic core-shell particle(CSP) employed as low-profile additives (LPA) for low-shrink unsaturated polyester (UP), vinyl ester resins (VER), and epoxy(EP).

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